I believe the exact opposite. If one could prove that text has not been generated by an AI, that would have immense value. StackOverflow has a built-in validation process ("mark as the solution"), which says that some human found that it solved the problem. Doesn't mean it's correct, but still, that's something.

I really wonder what impact ChatGPT will have on search engines. I could imagine that the first 4 pages of Google/Bing results end up being autogenerated stuff, and it will just make it harder to find trustworthy information.