Fear,
From what I’ve read a lot of nerves are removed in the 15 square inches or so of tissue during the circumcision. Also, the glans grows a protective covering of extra skin (that’s why it looks cracked.) The glans is supposed to be a sort of internal organ that’s moist and smooth.
I saw most of this stuff on the foreskin restoration and anti-circ web pages.
I’m looking to grow my foreskin until it rides over the head in the future so maybe it’ll provide extra sensitivity because the glans won’t be rubbing on the clothing material all day. From jelqing alone there has been a bunch-up of extra skin behind the head.
I was circumcised at birth and I know I won’t be able to ‘restore’ all of the nerves and frenulum that were removed but I wouldn’t mind the extra sensitivity later in life.