Yes, why wouldn't we want to focus on the male companion? He's just had nine months of... nothing, rather than vomiting incessantly, constant back pain, heartburn, insomnia, feet changing sizes, and varicose veins. We want to make sure he's comfortable!
I read that, if men were the ones capable of getting pregnant, that none of these things would happen. You know, cause of being stronger, and not eating the apple. Stuff like that.