I learned from reading the book, Grit that most kids who excelled at their extracurriculars become the most passionate and persistent towards their long-term goals which might be completely different from what they did as kids.
You may not have pursued a musical career but I'm sure your experience has helped you greatly! And maybe you were really meant to do something else. 😁
I think you're onto something here.. I honestly think that the mindset from taking something to a high level (in my case piano) is important for instilling the right attitudes to achieve other great things in life. For that, I am extremely grateful for that part of my life and I'm always looking at ways to take those lessons learnt and apply them to whatever I choose to do next in life. (Right now that's liketu)