Alright, you definitely want to argue. Let's lock it in.

My dick is easier to deal with because it’s circumcised.

This is going to shock you, I'm sure, but you must also wash your circumcised dick, and procedure is is roughly the same... Water, soap, rinse dry, whether you've got a foreskin or not. If it takes an extra 2 seconds to wash the extra bits of an uncircumcised penis, the the lifetime "extra cleaning" penalty of not having part of your penis lopped off is ~15 hours. Congrats, we're mangling children at birth to save 15 hrs of their life. What are you doing with those 15 hours? Because from the looks of it, you spent that much time crafting half-assed replies about how you're "so tired of arguing" for circumcisions.

The argument against is that it’s done without the permission of the individual.

No, that's your argument against it. The actual argument against it is that genital mutilation of a baby is wrong, full stop. Let's be clear here as well, medically necessary procedures are not genital mutilation, and gender affirming care when done with the knowledge and consent of the subject is not genital mutilation either.

all sorts of body decisions are made for us without our permission by our guardians as we grow up...

Absolutely, part of being a parent is making informed decisions for your child that they are incapable of making. Vaccines are medically necessary, and the parent(s) should be getting their child vaccinated. Braces, are frequently necessary for proper articulation, and properly aligned teeth last longer and make it easier to eat (ask me why I know this), and while not all cases of braces may be medically necessary, you'll note that we aren't gluing orthodontic devices in the mouths of newborns that can't resist the procedure. If you take a child to an orthodontist, and the child pitches a fit, refuses to open their mouth, and in general resists the procedure, I guarantee you, the orthodontist will not treat them, even if the parents come in and physically restrain the child. Your two, (rather shitty) examples simply do not support your claim that other medically unnecessary body-altering procedures are okay to inflict on people who are physically, mentally, and socially unable to resist.

That dumb argument may fly if there were NO benefits to circumcision AT ALL. But there are.

Let's add another layer to it. Do you condone Female Genital Mutilation (FGM)? Do you think it's not a big deal? I promise you, any reason you can find to support circumcisions, I can use to support FGM. If you support cirucmcison on the same grounds, then you must support FGM by the same logic, unless you think the only thing that determines if a procedure is genital mutilation depends entirely on if the gentials are attached to a boy, or if they are attached to a girl.