I think...
When a thousand creative original writers manually generate prose, it will take longer to find incidental overlap in their content, than when one million generative AI users cranking out derivative (textually inbred) works do the same.
AI may at some levels introduce orders of magnitude greater "soup base" content, and faster, possibly higher level permutations and combinations of the "seed data", but it will generate detectable bland homogenous output that the latest spam detecting systems (always using one level higher of AI) will catch and penalize.
Does anyone seriously believe that the biggest search engines won't be able to buy actual snippets of "civillian-generated" content. They won't need algorithms to detect AI spam - they can just search their dictionaries.
Anyone believing that the AI tools available to content creators can outrun spam filters is interestingly optimistic.
If SE spam is not the goal, how long do you think intelligent human readers (those who don't read or believe marketing BS) will take to be put off by the creative and scholarly limitations of generative AI?
Just saying.