Until you talk to a few parents and they say, "2+2=5? Yeah, we tried that. It worked pretty well up until 6 or 7 when we were able to have a real conversation about addition. Why do you think that's wrong?"
Then you might realize that, yes, not knowing anything about parenting actually does mean you have no basis to evaluate parenting decisions.
Then you might realize that, yes, not knowing anything about parenting actually does mean you have no basis to evaluate parenting decisions.