I think people vary in this. Just because some people find they learn poorly from pure reading does not make that experience universal. Some can just learn (and retain knowledge) via (uneffortful) absorption, others are better served via a mixture of absorption and putting things into practice. It is just important to recognise what best serves you and others, that people differ, and to develop a vauge sense of the average learning preferences of those you might want to teach.
E.g. at high school I learnt mathematics purely from reading textbooks, and found the requirement of needing to do homework and practice exercises in class hugely frustrating. For context, I did well and went on to do mathematics at university level, where my learning style more or less stayed the same.
While a great friend (who is quite possibly smarter than me) is the opposite, and they were greatly frustrated by the lack of putting things into practice, and felt it hindered their learning.
E.g. at high school I learnt mathematics purely from reading textbooks, and found the requirement of needing to do homework and practice exercises in class hugely frustrating. For context, I did well and went on to do mathematics at university level, where my learning style more or less stayed the same.
While a great friend (who is quite possibly smarter than me) is the opposite, and they were greatly frustrated by the lack of putting things into practice, and felt it hindered their learning.