Valve has ignored the quality problem of submissions for years. Lazy asset flips of demo levels have been common for years. It's less of a hedge and more of a restatement of what their position has been since they opened the floodgates. AI just made the bad stuff look better than it used to, so people have to relearn how to filter.

As far as I can tell, "slop" doesn't have a clear definition. It seems to just mean "AI used poorly or obviously". Nobody cares if a developer of a game uses AI as long as it's done well. They might not even know.

The idea that there is a future where game devs don't use AI, while the rest of the industry does, is absurd. We do know that AI will be widely embraced in gaming, because the alternative is, what? The honor system?