At a slightly less extreme level, it's always possible to find something niche enough that is just so obscure that you can become the best by persistence alone. Maybe you're the world expert on blue umbrellas manufactured in 1993.
(to be fair, there is also inner satisfaction coming from deep understanding and mastering of some activity, but alone it's rarely enough without any external validation to motivate people)
That sounds intuitively true, but it's not.
I thought the same thing, until I met an actual board game genius who beat me at every single game we played that I invented and practiced before playing against him.
That's why he makes a pretty good living creating and selling board games and I don't.
People with talents do exist, unless board games is your thing, it won't work.
this is a good thing.
again, this is a good thing, they’re happy.
And the person you were talking to didn't even say they were happy! They just said they're the best at some combination of things. Even assuming they are happy, they're probably not near the top of the happiness charts. "best at making yourself happy" looks to me like a completely unfounded guess/hope.
This implies there are at least 8 billion “things to be good at” which I don’t think is necessarily true. I suspect most people are not the best at anything.