Fun fact: most human artists in learn by tracing and studying the work of others'.
AI does exactly the same, except, in actuality, the process for AI is even more vague.
And, of 'Do you even know who's art are you using for your game?' Tell truthfully, do you? Name the artist(s) who produced these images, or otherwise your entire argument falls apart. And, no, you can't steal an artstyle (there are only so many chords to play in a song).
(P.S. This is not in defence of the game itself, only its usage of AI, which imo, could use improvement.)