The dirty secret is that having one or lots of children can be a JOY, a blast, an adventure, a boon for others when you raise them right as best you can.
Yes, it's hard work, but so is riding in a Greenpeace boat trying to stop whaling...who's to judge? (sarcasm)
If you have children, you might have something to fight for...oh, can't have that. Any thinking about the future might cause sheeple to question their handlers.
The way to shut up a leftist is to publicly shame them for being envious. The motive for leftists telling people what cars, houses, TVs to buy, what to eat, and the maximum number of children to have, is always envy under the guise of something more socially acceptable.