Rote learning - simple memorisation and regurgitation of textual/teacher-enforced knowledge - directly causes atrophying of two of the three traditional ways of getting valid knowledge - direct perception, analysis and prediction based on direct perception, and authoritative or authentic sources.
How does a baby learn?
I think primarily with its sense organs. Its brain is used mainly for memory, and for innate processing of physical events such as hunger, discomfort, and pain. [1] But, it is also used for emotional learning - happiness, surprise, etc. - from the moods of people and other living things around the baby. It is probably fair to say that a baby learns through direct perception of its physical and mental world and simple rule-making or analysis of its perceptions.
How does a child learn?
A child (in India at least!) is stuffed with facts, generally randomly and confusingly put together sans a consistent/logical framework. Such facts are often completely out of sync with the child's world, making them even more difficult to memorise and regurgitate. It learns to behave primarily based on physical, emotional, and mental reactions of surrounding adults to its own behaviour, and not from being allowed to explore freely in a safe and prepared environment. Ultimately, a baby's natural capacity to learn through its own senses and independent thinking is lost by childhood's end.
Why does it matter?
A child who depends mainly, or completely, on inputs, assessments, and discipline from the outside world and other people has lost the ability to sense its internal world - its own body [2] and mind. It has lost confidence in its own conceptual frameworks of its world. It is not taught how to travel skillfully among sensations, percepts, and concepts - basic ones or higher degrees or layers of concepts. It does not know how to validate what it reads and hears against its frameworks since insistence on rote memorisation means ignoring or deleting the frameworks. Nor does it know how to subsume, expand, or otherwise modify its frameworks since a child is not encouraged to experiment and analyse. [4]
Isn't it inefficient to teach through experimentation and self-analysis?
It depends on the definition of inefficiency. In the animal kingdom, a human child is already the most inefficient because it takes about twenty years to learn to fit into adult human groups.
Compared to other, more specialised, animals, humans are general-purpose, and are not the best at anything physical. Humans have succeeded as a species due to the evolution of their mental capabilities. This evolution came from original ideas and their sharing. There is also an exponential growth of knowledge across generations. So, yes, it is more efficient to learn from the experience of others (authoritative sources). After all, they have already gone down many mental and physical blind alleys and found viable paths that save time. Also, teaching is often a more efficient process than replicating an experience.
However, evolution of human consciousness requires the evolution of a majority of human beings, not just the rare special ones. Also, useful learning, understanding, and perhaps most importantly, creativity, result only when each human child, teenager, and adult has learned to generate and validate its own sensations, percepts, and concepts.
What is validation of knowledge or true understanding?
In a traditional Indian darśana, something is true or valid if it is found to be valid according to all the pramāṇas or channels of knowledge for that darśana. Thus, in sāṁkhya-yoga, something is obviously valid, true, or factual if one has directly experienced it (pratyakṣa), it fits into one's conceptual frameworks (anumāna), and it has been recorded precisely and faithfully by authorities (āgama).
However, all three validations are not necessary or even possible. So they are ranked. A directly-experienced sensation - a physical sensation, a thought, a mood/emotion, or even an energy sensation - always has precedence over concepts and authoritative sources. This is because concepts and their relationships change. So does understanding of authoritative sources, with more and different direct experiences, and changes in one's ideas, and different (deeper, wider) inputs from authorities. A truly original experience or conceptual framework, never experienced or thought-of by anyone else before, obviously means āgama cannot be used for validation.
Finally, in the oral tradition of yoga, āgama (arrival, etc. in Sanskrit) is construed to mean the transfer
of the direct experience or inference of the authority into the student or
practitioner. [5] For the first, an experience transfer, or evocation, requires a prepared mind or brain. In the spiritual context, that preparation comes through meditation and contemplation. When āgama is considered as transferring theories or concepts or ideas, we have the more usual meaning of teaching a concept after assuming that the student knows the concepts required to understand it.
Conclusion?
In both material and spiritual contexts, simple rote-memorisation isn't enough for "future-proofing" human beings. In a dynamic world filled with new ideas, cross-linkages across scientific and other fields of knowledge, and regeneration of traditional approaches to life, skills in validating one's own experiences and ideas and those of others are increasingly essential. Paradoxically, such skills come not from frenetic external activity, but an elegantly simple and relaxing journey inside oneself - leading one to concur with true sages that a natural human life can be both simple and stress-free, though not necessarily easy!
NOTES
[1] Sounds - language and play-acting, touch, taste, etc. as well. Babies are often stopped from experiencing things using all their senses. Unfortunately, this teaches behaviour at the expense of direct perception.
[2] One's reaction to hunger, for example, and eating only till one's body is naturally satiated, is trained artificially based on precepts like "finish your plate" [3] and mindless intake of over-processed food.
[3] This makes sense only if one is also allowed to take only as much as needed.
[4] Essentially, an experiment is a prediction of sensations, or percepts, based on concepts and their implications.
[5] A matter seen or inferred by an accomplished person (āpta) is taught in the form of words in order to transfer one's knowledge into another. The vṛtti from that word, with its matter and meaning as the object, is the listener's acquisition (āgama) - Vyāsa Bhāṣya for PYS I.7, translated by Swami Veda Bharati in his PYS w/ VB, vol.I, Samādhi Pāda, pg. 149