If you follow that reasoning, anything that improves or anything that makes creation easier, produces slop.

Personally I'm not in favor of calling AI output slop, just because it is AI generated. You might then as well say that any electronic music is slop and any food prepared with help of machinery is crap. It might be crap or not, the automatedness is irrelevant.

The outputs of AI that I see today in the form of text, images or video don't look like slop to me.