Maybe there are with combinations. I might be the best programmer who can do woodworking, play flamenco guitar, and squat 475 lbs. I'm just waiting for that category to be added to the Olympics.
I think your real niche is going to be creating software for luthiers that enables you to design the flamenco guitar of your dreams. Critically, you discover the ideal guitar body for flamenco is incredibly heavy…
That seems like a leap to me. I bet there's plenty of people who could take over that life and rough set of preferences and do a better job of being happy.
If I say that some people would be happier in some kind of impossible to reach theoretical, that's not a good thing, is it?
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.
