How many of the people who answer polls like that also have the ability to look at a poster and instantly clock that it was AI-generated?

Almost none, sadly. Most of the population just doesn't have that skill, which is why places like Facebook are just reams of AI Jesus upvoted to the Moon.

I saw this menu online the other day, and it's not even discernable from the photo what the food products are; it even sets off trypophobia:

https://imgur.com/a/YvyRjts

But people are still ordering it.

They don't care, because it's only tangentially about the concrete output. It's about the hollowing of human communication and creativity.