I never said he should force anything, but it comes across like he is trying to pretend to be an innocent bystander, that is creepy.
As opposed to a guy who tries to get it on with his sisters.
Look, this isn't just an incest game, or a satire. This is a corruption game, one that works both ways. It's not the trope perverted MC that corrupts everyone in the household (that's Hunter's job), it's the innocent, well intended MC that gets corrupted as well. You bring up the photo shoots. Yes, he was "just trying to help". Lines were drawn, lines were blurred, and things escalate to the point of crossing. The MC doesn't want to cross those lines.
I mean, he WANTS to cross those lines now, but he still doesn't want to, because that would be morally wrong. If you're trying to retort "if he wants to cross those lines, how can you say he doesn't want to at the same time? That doesn't make any sense", I simply say "well, you're playing an incest game, do you want to have sex with your family?"
I don't get where you come up with the "blame the girl for everything". He never blames anyone. He just freaks out with Lucia because that situation went completely out of control. To use a dumb analogy, it's like taking a kid to a firing range to have them shoot a gun for the first time, only for the kid to start shooting people and asking you proudly if they did a good job.
As for "forcing the girl to carry all the emotional baggage", again, no idea what you mean by that. Do you mean that the girl has to take the first step? Well, you saw how Catherin reacted when the MC tried to take the first step. You can call it manipulative, but there WILL be emotional baggage, no matter what. Let's take Brenna for instance: if Brenna takes the first step, yes, she'll feel guilty, but the MC will be there to help her through it. If the MC takes the first step, she'll still feel guilty and blame the MC for taking advantage of her in a moment of weakness, ruining their relationship. You can say it's hypocritical, but we're still talking about a taboo subject, something that's morally wrong. You need full consent, and as it has been stated in the game, "I love you" doesn't count during orgasmic bliss, so neither does "consent".