That's still a couple of paragraphs of extra work for every bit of content that you think would benefit from one, which adds up very quickly, for a fairly limited demographic.
It's entirely down to whether the writers for any given characters want to. Brint actually has a variation for virgins, but Wsan clearly didn't think it important enough to write a special variation for people who don't want to get dicked down and instead gave you the option to back out if you don't want that. Like I said above, writing variations to cater to a very small demographic adds up and also takes time away from writing literally anything else that they might actually care about doing, which was Savin's explicit rationale for not writing one for Cait when he was already going back through her content to tweak a bunch of things in her big expac. You can even read Wsan's thoughts on writing for an audience and the general assumptions that can be made about writing a minotaur here, for why he wrote Brint the way he did and why he's extremely unlikely to change that.
Again, it's not to say that people can't write this stuff but in an effort-to-reward analysis there's very little reason for most people to bother.
