It’s not as simple, unfortunately… “Just publishing game on Steam” usually doesn’t let the developers even return $100 they’ve paid for Steam Direct. The shops usually are not promoting the game themselves until the dev brings “external traffic” - that is makes a big (and thus expensive) marketing effort for a game. And when going this way “it becomes a commercial work” far from “just a hobby game” and requires skills I don’t have :)
E.g. this game got 309 downloads so far (11 months), half of those come from mobile version; that is 150 free downloads for Desktop platforms - if they get paid, I’d say it’ll be like 10-20% of those, that is $15-$30 total revenue: at this rate I’d better just pay Steam 100$ and publish the game for free :D