As placeholders or to create little bits and doodles (like a mouse cursor in the style of an armored fist), there are lots of little graphical icons in a game that would other have to be created by a graphical artist. Generative art is really useful in my experience.
It's reduced the work to the point where I can toy with it in my off time and spend most of my effort in the actual programming and development.
The other idea I have toyed with, coming from professional ML experience - was to build my own generative model and use it to create my own art assets. Here I wonder how the copyright rules would work - would the assets I train on be subjected to copyright? This is a much bigger conversation at that point and I wont be the only one affected.