On the other side, is to wonder if a certain amount of perfectionism isn't highly significant for some gifted people. If your main mode of learning is to learn things almost permanently, then your quality control needs to be cranked pretty high.
Maybe the alternate isn't a growth mindset or accepting mistakes, but learning how to free think in a safe sandbox part of the mind before something becomes permanent. Following that line, then free and imaginitive play and plenty of complex fiction may be the best approach to strengthen that "world conjuring" suspension of belief part of the brain.
