Seems valid to me. I won't read articles with model-generated header images, because it's a good indicator the rest of the text will be slop as well.
For a restaurant, a slop logo gives the impression that the owner doesn't care about the details and has no taste.
Beyond that, the use of generative models is a big moral issue for a growing number of people.
Yes, this isn’t a logical error at all. If you don’t have taste in one area — actually, it’s even worse, you’re not even aware of your own lack of taste — why would I trust your taste in another area?