Honestly to me AI covers always have something instantly untrustworthy about them... Could it be because of how I'm subconsciously primed that AI is used in scams (just think of those ads made by AI that pop up on youtube)? Or that I already have a pretty strong anti-AI stance? Probably. I think it really depends on the person.
To me, I really really like when the cover is actually from the content in the mod, it makes it really easy to understand how this mod might look like in game right off the bat. I much prefer that over an AI cover. I think it adds this genuine feel about it, and it makes it feel more like this is the passion project of another person- which let's be real most mods are- but you don't always step back to think about it.
To be honest I think because of those reasons people who use AI covers for their mods could honestly be doing themselves a disservice if they want their work to be recognized and respected...you're having to fight against people's preconceived notions about AI.