I understand where you're coming from, but you don't have to pursue your absolute best in everything you do. It's fine to just "do" things casually. I think people would be much happier if they prioritized participation over mastery.
Yeah, you will soon burn yourself out if you try to do the best in everything. It's really a matter of choosing a few key place to focus your energy and put in extra effort there, but to make sure you leave enough to do other things in life.
