Not a hot take, just a bad take. Koikatsu is easy and fast for people to use for animations. Yeah, it's a little cartoonish but at this point it's a style. Sure, you can go to r34 and see way better animations, but that takes a lot longer to do. And he's solo developing the game at the same time. Do you have any idea what it takes to model and animate a character in, say, blender? And then get all the fluid and clothing physics right, and then all the lighting and rendering? It could take a week to do a scene that'd take an hour in Koikatsu.