Why is not liking pregnancy such a taboo/ considered a mental health issue?

I don't know to be honest. I think it is just our culture and such at work. People are expected to want and have children, because that is just how it is done and it continues human existance. If a person doesn't want the same exact thing as somebody else, or feels differantly about it, people can get nasty real fast. Don't worry about those people, they aren't worth your time. If they bring up that subject, veer it off to something else. They don't have to agree/feel the same way you do, and if you keep off the subject they can't bash you over it. I do not think there is anything wrong with you. I hope this helps.