Love this thread @Bluewine, so thanks for posting it.
Reading all the amazing responses it's generated have been literally life-affirming!
Being able to play music, create music and make music with (and for) people is a privilege and a gift. It's communal, creative and joyful for me.
And the older I get (now 64 years young), the more true this becomes.
I think it was @Buddster who talked in their post about there being an extra special joy and purpose that comes from the 'visceral power of the bass', and that's definitely true for me.
[As an aside - whilst I can play guitar - probably well enough to get in a gigging covers band - I'd never enjoy it like playing bass.]
So, after thinking it through this morning, I'd say that music's in my DNA, but being a bass-playing musician is in my bones.
And that's what keeps me in the game....