Can my ego be beneficial?

I occasionally hear people who are younger than me banging on about “growth mindset.” And I think it's a terrifying concept because it seems to be rooted in the assumption that you're not good enough already, and that you can't be. And the truth is while it is accurate that age 17, I was not good enough at literally anything that would make me a useful, productive human, over time I have got a bit better at some things, and I'm good enough at some things. And I could either spend the rest of my life stressing about that and trying to push even further, or I can just bank what I've got. And I think we'd all be happier if we were willing to bank what we got.

The obvious example that's always talked about is the Instagram mindset of people endlessly exposing their vanity as they encourage others to feel inadequate. None of that is a valuable thing to do.

I'm not sure ego is quite the word I would use for it, but certainly that level of comfort that you are already... Well, actually maybe the right way to put it is just to accurately have a sense of your own capabilities and which ones you really care about getting better at, and being comfortable that you are already good enough at the things you want to be good enough at.