I haven't seen the It movies yet so I can't answer anything related to that yet. But as far as I know, Milfy City does not require you to progress with all girls to continue the other paths game. I reached the end of Caroline's story and I've NEVER finished the Mom's story all the way, nor the Aunt's. There's still no way I believe a person who was really opposed to mistreating women in games could make it past the first few steps of the path without having to stop.
It seems designed that way so you know that path isn't for you, kinda like games that have a bisexual MC with gay paths. Why would you progress the path and go on 3 dates with a man in a game if you weren't going after his sex scenes? Doesn't make sense to act shocked when you get to the gay sex. Even if it was just out of curiosity for the writing or something, I think a person turned off by gay sex would reload their old save as soon as the undressing started. Because where else is it going?
The comparison to bisexual content doesn't really fit in my opinion. Straight players have no interest in gay characters in the first place so they don't mind missing that content. Most people probably want to get to the sexy stuff with Celia but they may not like the actions they have to take to get there.
In Milfy City you don't really have the option to play it your way, rather you have the option to abandon the "main" quest or become a rapist.
That's what
DiddlerGames was getting at with the novel comparison. If I read a novel and half way through one of my favorite characters rapes some unnamed character, I can skip the chapter as soon as I realize what's about to happen, but I still know that it happenend. (Granted, it's not a perfect analogy either)
To be clear though,
I don't mind the existence of Celia's content or the Night-Creeping (which thankfully doesn't hinder progressing) and am happy for those who like it. I just avoid it and be glad that it is avoidable unlike Icstor's previous games. It does ring rather hollow though, when the main character in one part of the update proclaims he'd never hurt Caroline like her ex did when he drugs and rapes Celia in another.