Feedback is important. Sometimes. Maybe. Sort of. Well not always. Not so much.
In your life, you will get plenty of feedback. How you process it, defines how successfull you will be. For me, feedback processing and feedback ignoring are the 2 most important things for improving yourself.
Most of the people focus on the processing thing and they end up sad and miserable. All important feedback is negative. All unimportant feedback is also negative.
Positive feedback may make you smile and happy for a moment, but it will never change who you are. And what is happiness and sadness anyway. It’s just some chemical reaction of the brain.