I see this sort of hobby -> income path in my hobbies as well, but its entirely based on the online content I consume, and the fact that content production is a hobby and getting good at content creation makes it a moneymaking opportunity that I believe is really hard to pass up.

I paint wargaming miniatures to play tabletop games and every content creator I've followed over the past ten years either stopped producing content as a hobby or now has a Patreon and hides at least a portion of their work behind a paywall.

Then, when I go to a wargaming tournament, here are all the people who enjoy the hobby of painting and playing wargames instead of the hobby [or maybe, profession] of producing content.

So it seems very much a bias of the content I consume, and when I dip my toe into other hobbies [say, hiking, or RVing] I see the prevalence of money making content production there too.