What about circumcision? Is it all about forming group bonds?
Not being circumcised meaningfully increases the odds of transmitting and contracting certain diseases, by around 50%ish (though reduces some, interestingly enough) [ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2907642/ ] and increases the risk of UTIs significantly (by about 75%, albeit still not super common). [ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6119846/ ] Consider a world without antibiotics, and a UTI…
Foot binding probably led to reduced STD tranission as well, due to women being unable to leave the house and become sexually active (which was part of the reason for it), I don't think medical benefit is a good defense of violating a human beingst agency and bodily autonomy.
There are other cultures that have other circumcision traditions that are much more brutal, I don't see any arguments for their medical benefit, and I think this argument about medical benefit is a rationalization for defense of a cultural tradition after the fact.