I'm sorry this just isn't true.
The options don't disable transformation, they just make it slower (or faster). Transformation WILL happen if you choose certain options, and much of the content is gated behind transformation scenes. For example, one thing that is bizarre to me is that as a male, if you eat a woman's pussy that automatically flags you as going down the feminine / submissive route. Despite the lead up to it, if you're domming the hell out of mother, forcing her legs open, and eat her pussy, at the end you get a transform towards feminine / submissive.
BUT I will say that there is a back button, so if you hit a transformation trigger, you can always go back. But I do
@Drafox that it can get annoying when a game forces you into transformations that you didn't want or even expect.
Still the game is quite good and worth checking out in my opinion. Just be ready to hit the back button if you don't like the results.