I don't think it happens nearly as often as you're saying it does, but I respect your viewpoint. At first, it is a protagonist who is not used to femboys and doesn't have a solid grasp of what they are. So, initially, there is some intentional teaching. I want to show players that femboys are people, not just sexual objects. And I feel like that goes away after the second episode. There is Robbie, a different femboy, so that needs an explanation.
It's good that you know this, but not every player does, and many have learned through this game. And the protagonist doesn't know, so that is the story being told.