So a human growing up with a cut foreskin simply adapts and the brain perceives more sensitivity from the other nerves to produce the same levels of sensation.

That is just false. You sound like someone who isn’t circumcised.

Without the foreskin intact, the glans is subject to friction throughout the day as it’s in contact with the inside of one’s clothes. This reduces sensitivity over time and builds thicker, drier, and rougher layers of skin. Whereas the glans of an uncircumcised penis is basically a mucus membrane, on a circumcised penis it’s more like the skin of a knuckle, but thicker.