Hard facts: Steam has over 73k games - and is growing at over 10k games per year and increasing. The median game on Steam earns less than $800 - down from $4k in 2020. Making a game is not hard - marketing a game is.
I think that, while making a game is not hard, making an excellent game is hard. And I think making an excellent game is a lot like reaching product-market fit. It takes fast iteration with user feedback to find the fun, then a ton of polish to make it extraordinary. It has to be so good that, out of those 73,000 games and counting, I’ll spend some of my money and time on it. The way GenAI can help here, I think, is…
Making an excellent game takes quite different skills than creating a commercially successful game; just compare "pop culture" (optimized to be commercially successful) vs "high-brow culture".
Even if you are not the "extremely high-brow taste" kind of person, there exist quite some video game genres in which excellent games are produced, but the audience of these games is a quite small (but sophisticated) niche audience, so that just by volume, games of these genres likely won't make a lot of money.