Autonomy is important when it comes to both sex, and gaming and doubly so when it comes to sex in adult games.Imo, it is bad for a sex game highly focused on the choose-your-own element, since the sex is a huge part of the point. It'll be less noticeable depending on what your path preferences are, which is likely why it doesn't bother you (to ffive specifically). But the point of design in the end is to increase enjoyment. I can absolutely see Charisma, Charm, Athletics serve their purpose for the other elements. But in the end, I see those things as there to add necessary immersion in what is, after all, a sex AVN where you want to get the character & personality you've formed into certain sexual situations. When those sexual situations are present already, on your specific path, and only grayed out because you don't imagine your character would say "I'd like to stick my hole-in-one, yuk yuk" while playing golf, I just find that silly and poorly thought out, really. Not serving much purpose.
These are more my thoughts on design in general & what the end goal is. An AVN, especially in respect to the "A", is quite different than a platformer.
Other part is, I don't believe it reflects real life very well at all either.
If you just want the sex stuff, and not to decide anything then it makes a lot more sense to just watch a porno.
Having grayed out or hidden choices is also important sometimes, becuase it wouldn't make sense to have certain choices otherwise.
A good example of this is when Ivy asks Lena "Are you falling for Ian?"
If Ian answered everything like an idiot, and Lena put no effort in either, then why on earth would the choice for "I am falling in love" be there?