Nah, it is literally just down to pettiness. People have been asking for it every update, for years, and somewhere along the way it became a case of "Fuck you" from Savin's end. Refusing to add that gives them joy at getting to refuse people who annoyed them personally.
I could understand "ew gross", but this is literally just pettiness. Exploding portals, taming and making waifu out of demons, reversing curses and time traveling / ghosts, planar traveling, all that you can fuck with. Cait's birth control? The one law of the universe so long as Savin is pissed off about annoying fans.