Yes - previously there was some chance someone reading the ideas on the blog would contact the author to thank them, or ask them to collaborate.
When laundered via LLMs whose pretraining destroys all credit, that can't happen.
If all you care about is financial, expected value of someone reading your blog and asking to collaborate is MUCH lower than odds of being part of some settlement in the future with these AI companies ingesting your data for training purposes.
OK, and there's still some chance, right? I don't understand why you say it can't happen any more.