According to my medical doctor. about 1 in 4 males sufferes from too tight a foreskin. It used to be and probably still is diagnosed at an early age through the usual child health screening (assuming most countries do this). A torn foreskin can lead to infections, scar tissue and a bunch of other nasty things once the male gets sexually active. There
is a hygiene issue if the foreskin can't be properly pulled back for washing.
Circumcision is a standard medical treatment (again assuming - country wise) as much as removing an appendix or tonsils, and as long as it's done by a qualified doctor there's not much risk.
The alternative, and I can't believe they still seriously suggest this, is trying widening the fore skin by stretching it. No body part of mine ever got wider by stretching, by the amount of food I stuff in my mouth it would be several meters wide by now. I can't detect any effects on my ears either, and I wear earplugs on a daily basis and sometimes at night.
A circumcised penis is so much easier to keep clean, much more pleasant to look at (my and my gf's opinion) and a bit less sensible, but in a very good way (again, to my and mf gf's opinion).
There is no reason whatsoever to not circumcise a male, and given I personally know men who still suffer from too tight a foreskin at the age of 40 (!) because shame and guilt prevented them and their parents from ever addressing the issues.
Sometimes I wonder if we are falling back into the dark ages
Yes, operations can go wrong, but that's true for almost everything involving medicine and a sharp instrument. Usually, there's not much to worry about. Gender reassignment, my giddy aunt. That's the same as not having an operation because one is afraid Dr. Frankenstein removes the wrong leg, kidney or brain.