As someone who had a circumcision 2 weeks ago at age 26 because of phimosis I can say that it is certainly not something i'd recommend if you had a wang that worked perfectly well.
My phimosis was severe enough that the other treatments weren't working. I was still able to do everything you'd want to do with your schlong, but I couldn't get the foreskin over the head (and had never been able to). Obviously other than hygeine being an issue, i've had to be very careful on entry during sex to avoid potential ripping. Never had an incident but i've always been careful.
For the first week or so the head of my cock felt basically like the raw skin exposed when you rip off a toenail. It's gotten a lot better but it's still super sensitive. The stitches are starting to dissolve which has made it a lot more comfortable but it's still pretty uncomfortable.
Obviously in my case it was the right move, but obviously a general anesthetic, surgery, 6 weeks of painful, tender recovery before it's useable again, and on top of that the risk of infection, it's just not worth doing for anything other than a medical reason. It's heinous that they'd do it to a child, especially before the child is even able to have a say in the matter. Good on Germany