[adave]

What you say makes sense but misses a critical point i.e of self compassion. Looking at the piano example, if they are kind to themselves and based on the amount of compassion they have, a failure of screwing up a few keys might be nothing, missing a piece from a song might be a bad day and screwing up a live orchestra may be a learning experience. To another unkind to self piano play one or all of these are catastrophes and a hit to ones self esteem. Both of these folks are experienced piano players but the former is able to disconnect and review their mistakes without placing a judgement on self(i.e. being a harsh parent to self.)

Depending on how harshly one judges oneself is the reason for not handling criticism to ones failings. No one is perfect so one better be kind and try to learn from their mistakes and not take it on their ego.