Yes there is some garbage there, but it is a drop in the ocean of garbage available on other platforms, with every high school kid dumping a copy cat of their favourite game with various levels of implementation quality.
Welcome back 1983!
The better way is shown by Steam: provide tools for people to find interesting stuff and have people manually make recommendations. Even just the tags that Steam has make it much better than 99% of other stores out there. I'm not a fan of Steam overall due to the DRM pretty much all of the games in there have, but from a UX and discoverability perspective it is pretty much the best store despite being one of the most open stores.
And anyway, consoles aren't locked down for quality control, that is just an excuse and was always an excuse ever since Nintendo said it back in the 80s. They're locked down so that they can have control over the software that appears on console, to get their cut from the software sales and be in control over the console's lifetime so that they can ensure nothing will keep it alive after they decide to make a new one.
None of these are about quality nor anything that is of any benefit for those who have purchased the console.