It's easy to forget the counterpoint in favor of circumcision, that that little flesh tyrant in the grape sized nugget in your neck, with sensors ending at the tip your penis is what makes you an carnivore and wild animal, you are of negative use to your republic, that animal has to be destroyed for the good of the many. We've evolved away from the mammal species and we are higher beings of light who does things because they are right, and not because we want them, we regulate and shut down our 2.5 billion year old limbic system in a stoic way to do the right thing, not the thing that gives us endless pleasure.
https://www.youtube.com/watch?v=GEf6X-FueMoJP talks about how in ye olden days, life wasn't like your zero-obligation existence today. People in the past went so far as to throw their firstborns into the post-holes of the laid foundation for the republic, to proove your allegiance.
Circumcision is a mark of allegiance. You experienced an extremely watered down version of this when your school made you sing the pledge of allegiance to the flag.
Why is allegiance important? A sign on the penis can't be faked after the fact, or at least at that time. So the rabbi sucking the boys penis. That's initiation into the trillionaire's club. It was a big deal and it wasn't stupid. The practice was part of the origin of civilization that won the game of thrones.
Don't make me tap the sign. You are surrounded by murdermonkeys who are on good behavior because it's optimal policy. When the grocery store, gas station, and work house runs empty, I can assure you, the amount of time your neighbors will need to produce a rifle and steal all your shit, is the amount of time it takes to get hungry.