Child-hating will come back and bit us in the ass

I come from a culture that loves children. Child free people exist and their choice is usually respected, but there are virtually no child-hating people.

Having children doesn't ruin anyone's live cause they are raised in an adult world. They are allowed to be children and have fun while sharing activities with the adults around them. There are no child-free weddings because a nephew or nice is considered as much part of your family as a brother or sister are. It doesn't matter if they are children. Adults party with their children around (probably harder than in most of the world), they go to events with them and bring their children along to hang outs with their child free friends.

I see a lot of child hating people online. They don't like that children behave as children in "adult spaces". They say they should stay home until they learn to behave themselves.

Sorry, How do you expect them to learn? Do you think they'll learn your societal norms by the art of magic when they turn 18?

This is just gonna shape socially inept adults who can't behave at a restaurant at 24.