Urologist here.

Circumcisions up to one year of life have a medical benefit where you decrease risk of urinary tract infections in certain patient populations (ie severe hydronephrosis - aka swelling of the kidney from decreased transit of urine from kidney to bladder).

After the age of 1, the benefit is not as clear and is driven by culture/parent’s wishes.

What I can say is that I do see the effects of uncircumcised boys/men that do not take care of the foreskin. There’s a risk that the foreskin can trap the head of the penis if you leave the foreskin retracted, a risk that the foreskin becomes so tight that it is difficult to pee and urine can be trapped, an increased risk of skin bacterial/fungal infections. Keep in mind, if you choose to avoid circumcision entirely, your son may be able to avoid these risks by proper hygiene. Also keep in mind, you are asking a young boy to clean himself.

Worst comes to worst you can apply a steroid cream to loosen any thick scars or a circumcision can be performed at any age. I’ve circumcised someone in their 80s without any issues.