It takes almost a perfect storm of potential, communication, determination and timing to birth a successful company/product. I think it's just what our "startup" environment tends to favor, and how the ecosystem just works, for better or worse. If we had more companies like Gumroad, Atlas, and IndieHackers I think that there'd be a proliferation of growth in the creator space. Even just getting decent health insurance as a single-person LLC/company is a frightening thing, and that's just _one_ obstacle!
I also think that, once more and more folks awake to the idea that you don't need VC funding to get something off the ground (and that it's really an achilles heel in many regards), that more products will start getting out there. It's also a conflict of interest many times: they want a return on their capital, whereas you want that _and_ to make something of value. Sure, VC is necessary in many regards, but it also isn't in a lot of cases.
I'm really happy that Gumroad stuck it out and is fighting for creators. Just the notion of them _not_ closing for financial reasons is comforting to me. Means that they cared that much about their users and the bigger picture, rather than just money.