AIs and LLMs have an extremely uphill PR battle to fight right now. Anything that is deemed AI generated is assumed to be borderline trash (lots of exceptions, but you get the point). So, I can see that if someone uses LLM to generate text, they don’t want it to be marked as “low effort content”.
There are definitely exceptions, and that there are maybe proves that it is less Anti-AI prejudice at play and more just reacting to things that are indeed trashy. It just so happens a lot of it today is from AI I think (for, I hope, obvious reasons).
Just to say, maybe give it a little time, but a watermark like this is not going be thing that decides someone's reaction in the near future, just what it says. (I am just betting here).
But its going to be an uphill battle either way if you are really getting the model to write everything, I do not envy that kind of project.