Forced Incest

I see a lot of anti incest porn that I don’t understand. It’s a lot of this interviewing porn where they interview a girl about incest and then have sex with her. Like what? Then there’s this forced incest porn where the dad or step dad is in the house and he knows his daughter (or step daughter) is being filmed and will do whatever to make the act happen. Like watching as a dad walks into a room where his daughter has been filmed having sex and seeing the reaction. And there’s this other one where a girl is filmed having sex with a food delivery person while her father is home. I get that the whole thing is a porn and this isn’t actually real but I mean I’m attracted to incest too (just the idea) but I have to deal with this anti incest porn? Why is this shit so popular?