The reviewer is essentially saying: “If they cut corners on X, they must cut corners on Y”, which is a common logical error in making judgments based on incomplete information.

Are you looking for "category confusion"? It's a conflation, but let's look at the logic. (So yes, my prior is that there is logic.)

"If they generated their logo by mumbling things at a toaster / picking something from the vending machine and then 'owning' it, how likely is it that they stole a sandwich in a grubby wrapper from a bum and are going to hand it to me and say 'I made this'?"

Edit: the article is paywalled, but a number of comments remark on the owner's sense of entitlement. So my moot is probably close for throwing blind. So then that might be the real issue, and the logo is a proxy for a perception of lack of work + mental bullying.

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.

https://en.wikipedia.org/wiki/Horn_effect