To develop one's abilities to improvise, one should not look at self-learning and improvisation as a second choice, as a default for 'normal' behavior. People often regard improvising autodidacts as amateurs, most people only improvise if the rules do not apply, e.g. in emergency situations. Skills acquired at school do not go very deep, they only work as long as there are no surprises. Self-learners can cope with many different situations, as they understand their matter in and out. School focuses on discipline and imitation, denying students opportunities to seek their own answers.
School ridicules self-learning and improvisation.
But self-learning and improvisation are the keys to personal development. Instead, one should spend one's time and energy trying out things, and that way learn from experience, improving one's insight in the matter and becoming familiar with it through optionality.