The nier series can be summed up as: subversive for the sake of subversive.
In the original Nier, not automata, there was a character who wore lingerie and cursed like a damn sailor. The idea is that subversive femininity masculinity hermaphrodite.
In automata, they are robots. They do have sex, and they enjoy it. Every robot decides their physicsl form, so 2B decided to have a big ass. 9S chose to be a cute twink.
Platinum may have made the gameplay fun, but the story is intricate and directly references Jean-Paul Sartre, Karl Marx, Engels, and other philosophers.