"Porn RPG" is a broad genre tho. You can absolutely make a pornbased RPG game. But what they seem to want to do, is focus on the RPG side of it, so that the porn element just becomes a gimmick they used to get funding.
As I said, people are going into this thing for the porn, in order for the product to do what it says on the tin, it can't then jam game mechanics in there that actively stop the player doing what they came here to do, so to speak. What you don't want is a player jacking off, who then has to stop because of combat or because of something else actively impairing them from enjoying the game and themselves.
It's like starting a porn film for there to be 20 mins of backstory and character development that you can't skip. Anyone would just turn it off. Because that's conflicting design.
Now, if they effectively add a "creative" mode, where you can do just that, then who gives a shit because you get the full propper game-game, for those who want to play a game. and you get the porn elements all in one easy to access and enjoy place. Win-win that way. Or a cheat mode of sorts, to just bypass the gameplay that would get in the way, so you can do the character stuff and the other elements that still fit a porn game.