Grab

And by being better at it than anyone else, they'll naturally become professionals in that area

Complete non-sequitur. There is much more to being a professional than the ability to sing or play. Giving up a secure, if dull, job for life on the road and an uncertain future when you've got obligations to family and social ties where you live is not a light decision either now or 200 years go.

Is it inconceivable that someone could be good at something purely for the love of it without getting paid?