Something I hardly see mentioned in these kinds of discussions is: why the heck would I buy someone's AI slop when I can just generate my own AI slop (not that I'd personally want to)? Because they go over and edit it? How do I even know if they actually did that? Why even bother with the middleman?
Because 'someone's AI slop' isn't zero work and probably cost some money for subscriptions. The non-zero work includes prompting 'skills'. We have been able (and have done so) to create our own settings, our own adventures, and even our own rules for decades AND we still buy the 'slop' created by others for decades. 'Others' being TSR, WotC and the plethora of third party publishers before and after the OGL/DMs Guild...
Just because someone wrote it, doesn't mean it's good. Even the latest adventures for 5E from WotC contain errors and inconsistencies up the whazoo!
The prejudiced assumption is that AI will produce 'slop' and that a human writer that publishes a product and asks money for it will have 'quality'. I know the later is untrue. And what I've seen from my simple experiments is that ChatGPT can generate more storied and evocative descriptions then most official D&D writers do in official products. It just takes a bit of finessing and that can take time, and time=money. It's not literature, but neither is any published RPG product...
What if that 'AI slop' is 'better' and/or cheaper then an equivalent 'traditional' RPG product? What if that 'AI slop' fits better with what you want then the 'traditional' product? The point of AI imho isn't to replace anyone, it's to let you do more with your time. Let's say I'm really good at using AI tools and can be 10x more productive then via traditional methods? That also means I can produce products almost 10x cheaper (minus costs for AI tools) and can compete very well with 'traditional' products.
And we pay people daily for things we can do ourselves. I'm moving and need to paint a wall, I wanted to do it myself, but after the fact I could have better hired someone else to do it. It's not just about the time and the skills, but I'm unnaturally close to the walls and see every blemish and want to do it perfectly. A professional wouldn't do it perfectly, they would do it good enough, and I would never have a reason to inspect the entire wall at a distance of 10cm... The same goes for RPG stuff, we don't need 'perfect' we need 'good enough'.
To be honest, some of my favorite/treasured pnp RPG products aren't very good objectively. Some of the most fun novels I've read aren't literature, as a matter of fact I tend to avoid literature if I can help it... Some of it is even trash! But it's my trash that I like!

If it's trash that you don't like, great, don't buy it or consume it. But we have a junk food category of food in the world and it's worth over a trillion dollars worldwide... Talk about slop...