Oh, you can like the fetish and if the target audience really voted for this and the dev planned this all along, all is good and well.
But there are some kinks that I see a lot of people begging for or hating on. Often on games that do not feature the kink to begin with or feature it in a way that actually is not what people think it is.
Here for instance I do not see preg in the planned kinks. Adding it later is kinda a big thing, because it is one of the dealbreaker kinks. Like futa, ntr, gay, incest, furry and so on. Some people like it, some people do not care, but some people actively avoid it.
It depends on the game and the setting and how exactly one wants to implement it. Pregnancy in particular is delicate, because of all the realism it entails. We are talking about a suspension of disbelief lewd game, where things happen, that do not happen in real life and other things that would happen in real life will not happen ingame. Like the women having a headache and being not in the mood or the mc being too nervous to have a boner.
Anyways, it is a big thing to add in a game and not something trivial like the question, should a solo masturbation scene be added or not. Well, actually, adding it onscreen for the male mc would be a dealbreaker kink for some ;-)