I totally get your point of view, I also make games. AI are tools that has been helping us in video games for a long time, but not like this and it is not ready to replace game developers and game artists.
However, it's true that it's great for creating mood boards and prototypes, but a little photomontage would do just fine. But for free content like that, it's not totally disturbing, as long you give the context and warn that there is AI