Well, the pregnancies from the pregnancy system aren't necessarily endings, but you are restricted during the pregnancy, that's true. I know it's not everyone's cup of tea, but I couldn't find a way to let players play regularly and still have the game make sense to me, so that's why we got this compromise.
Maybe if I had the pregnant content planned since day 1, I could have implemented it in a more integral way, but it's not something I can just seamlessly introduce now.