What is law enforcement and when has it ever not been a threat to have someone come knock your teeth in if you piss off enough or the wrong person?

I think the more likely answer is indeed in the picture: baby's first philosophy. There is a lot of wisdom and behavior grooming in it, but I'd argue the reason is the other way around: It was to try and tell leaders and fathers (in patriarchy, anyways) how to not get their teeth kicked in and how to teach and deal with bad people.

It's an instruction set that has been combined with simple history telling, and then corrupted by thousands of years of dogma and constant revision from the selfish and rich.

It's silly to anchor your moral axioms in systems that require obedience to authority or belief without evidence, and that is the only true difference between philosophy and religion.