What is the purpose of recognising and learning from mistakes?

Higher learning is not in favour of learning by mistakes, because you then accept that a mistake will be made in the first place and some mistakes can be fatal. Far better than 'learning by mistakes' is 'get it right first time' but that can only be imparted by an exceptional tutor with a full understanding of task and skills analysis.

On top of this, people often learn the 'mistake'; far better that they never make a mistake that can be learnt.