Let’s be real, just like adults, some kids are awful. I’ve known good parents that get dealt a terror of a child.
Also, it’s a meme that is obviously over the top. Child free people also don’t have money falling out of their pockets. Don’t be so serious.
Not everyone cares to have children, so that’s a whole big realm of “gross” bypassed.
Between two people, the amount of gross stuff NEEDING to be done should be minimal barring health issues.