I've always figured that a big part of it was just that it's hard to do hair well, so leaving it out just makes their job easier, not realizing that large numbers of people would be passionate about it. And of course it's a point in common with most porn of the past couple of decades.I also understand why they ax the pubic hair and provide no option to keep it.
And thats because the majority like you said prefers a shaved pussy
I've always found it very unrealistic that almost all characters in every AVN I've played are either completely bald, or have just the lightest dusting inf pubic hair. It's pretty low on the list of "unrealistic things in AVNs," but it's still on there. So it was somewhat refreshing to see hair on Miya and Cadence, and it sounds like Stella may have some as well.