That's probably just your knee-jerk reaction. The same that people express when they are told they are eating a vegan food. The right question to ask yourself is: how confident am I that I would be able to distinguish between AI and human art if I didn't know how it was created? You seem to be pretty confident that you can tell them apart, but I call that bs.
Are you for real? I can confidently say that you could. If I put a generated image next to an actual piece of artwork I'm confident even you could very easily distinguish between the two. I mean, you making it out like it's in some way difficult which is confusing. I can pick up whether an image is generated using Dall-E within a few seconds, much like most people I know.
Not sure what you mean with that vegan nonsense, but okay haha.
Please, go ahead an generate an AI image to advertise your videogame or book. Take out as much of the human creative process as you can until we're left with a world of algorithmically formulated 'art'. I've got a moron friend that keeps showing me images he's made using an AI, at first glance they look interesting but after a couple of seconds you realise it's one dimensional and hasn't impacted you in the same way actual artwork does. There's a nuance to creating breathtaking art, and a lot of that comes from ideas and emotions far more complex than algorithmically smashing pixels together.