In this comment section alone, 5 people have used some variant of that aphorism, and it's used constantly on hn and other sites. They've heard it.
If the spouses-to-be at a marriage ceremony say "I do", would you leap up from the audience to denounce them as frauds because obviously they heard the vow-formula before a hundred times? Hopefully not, and not only for reasons of decorum.
In contrast, most of the LLM slop I deal with from coworkers involve statements that--while less formulaic--are ones they can't even recall saying and are unwilling to defend when questioned.
If we go with your interpretation instead, then sm-silversight simply misread the comment they replied to and their post doesn't follow. No one doubted OP felt sincere about not wanting to read AI.