In
Female Agent, I picked a small-chested main character, and the game immediately forced me to get her nipples pierced for her job as a bargirl while telling me that if I had picked a larger bust size, I wouldn't have needed to. Even though there's not a ton of visuals in that game, I was not exactly pleased.
But yeah, the idea that different people will prefer certain types of appearances is one that I think makes sense but is generally ignored for various reasons. Probably because it gets too difficult and restrictive to implement, I guess. Oh, you have short dark hair instead of long blond, guess you're restricted from or at at least at a severe disadvantage for all this content! People wouldn't be happy with that, and developers would arguably be needlessly handicapping themselves and what they've made, so I understand why it doesn't happen even if it seems rather silly when you think about it. I tend to prefer relatively modest women with petite and rectangular body shapes, but most NSFW media seems to think 100% of guys only like women with hour-glass figures, preferably with large chests and butts, who are completely shaven and airbrushed over and who also wear nothing or as little as possible. Luckily, there is at least a small percentage of NSFW media that tries to be a little more diverse than that. Not enough, but they're there.