Not as the game is currently, since it's predicated on you 'unlocking' the sex acts. Most of them start pretty low, and I don't think anybody starts as 'fascinated' or even 'very interested'.
Everybody is malleable. You know this saying that 'torture does not work'? It's true for getting timely information, which is what it's mostly used for these days (in the sane countries). It absolutely
does work for bending or breaking someone.
Playing mind games is also very powerful, especially when you already control most aspects of someone's life.
All a strong personality will do is take longer to break in, inflict bigger trauma on herself and have a higher chance of trying to fuck with you if she sees a relatively painless opportunity to do so. All of which are already modeled in the game, although you can definitely quibble about the details.
I do see your point, though, and having some stronger resistance from the girls would be welcome in my book. But I think Goldo said at some point that his goal was to have a
simbro game, not a 'slave breaking' game. So the girls are all more or less sexual from the start, since otherwise there'd be no 'brothel' in this simbro. Or at least not for a long while.
I'm not saying your ideas are
bad. I just don't think they're as 'realistic' as you might think and they probably do not fit Goldo's vision.
It is very much possible to change the game to reflect your proposals more closely. But it will most likely have to be a mod.
Mine, for example, had multiple-naked-phobia girls who would never progress anywhere unless you ranked them up quite a bit. Because, unlike vanilla, I had the 'stairway to heaven' and 'naked' gated
everything. And you couldn't remove phobias without her getting comfortable with at least one relevant act. It also had most of them absolutely
refuse whoring in chapter 1, and
a lot of stat grinding to make them like it enough to become whores. Enough to last over a year.