There are millions of asset flips, but the top indie games have never been better. It’s hard for indie developers because there’s so much competition: you need to heavily promote a quality game only because there are so many other quality games.
Likewise these tools have enabled many more people to create vibe-coded slop, and may lead to more quality software (making it harder to stand out without marketing), but the best software will only get better.
The implication is that the gatekeeping has become marketing dollars, when it used to be skill at making a fun game. I don't think we're in a better situation today.
There are fun games that succeed without marketing, e.g. Balatro, and there are bad games that fail despite it, e.g. Highguard.
The reason that “skill at making a fun game” doesn’t guarantee success is because there are so many fun games. Much less, if at all, because there is so many slop.