I think we have a misunderstanding - I don't mind if I'm reading AI generated content as long as it doesn't look like "the typical AI content" (or SEO slop). In my point of view companies/writers might use AI detectors to continue improving the quality of their content (even if it's written by hand, those false positives might be a good thing). We're not there yet because I still see and read a lot of AI/SEO slop.

I agree with you that the "portion of written content online that’s AI generated with no obvious tells" is "small yet growing". That's exactly the thing - it's still too small to "be there yet" :)