>> The results are nice and I use them.

I haven't seen your presentations, so I can't speak to them. But I do know at work there's a lot more illustrations in docs and presentations and such, and they almost all have an AI art "tell". I find them grating and distracting from the actual content. Very rarely do they add anything useful to the doc other than the knowledge that the owner burned some GPU time and tokens for a distracting, low value illustration.

I can only imagine how an actual artist or graphic designer feels about it.

Actually I don't have to imagine; there's some serious vitriol over on some of my favorite webcomics about it.