I think this is an excellent question and one people should be asking themselves frequently. I often get the impression that commenters have not considered this.

For example, whenever someone on the internet makes a claim about "most x", e.g. most people this, most developers that. What does anyone actually know about "most" anything? I think the answer "pretty much nothing".

Yes, this is an important point. Insert the survivorship bias plane picture that always gets posted when someone makes this mistake on other platforms (Twitter). We can be accurate at detecting poor AI writing attempts, but not know how much AI writing is good enough to go undetected.