You misunderstand me. I know FGM isn't rare, the particular type of FGM that removes only the clitoral hood is rare. Type 3 FGM which is the most common is also the most extreme.
If you really believe that there isn't strong evidence reduces HIV infection rates than you are simply too biased to listen to reason. I understand there is conflicting data but that is the same with almost anything, including the belief that vaccines cause autism. There is at least as strong a case that circumcisions help prevent HIV as there is evidence that vaccines don't cause autism. The WHO, CDC, UNAIDs and the most rigorous studies support this view.
What do you mean "no apparent reason"? The reasons are quite clear. It reduces the risk of transferring STIs, it eliminates the possibility of developing phimosis and there is also some evidence it can reduce the risk of cancer in both men and women (who are the sexual partners of circumcised men) as well as UTI.
There is absolutely no way circumcision is as bad as FGM unless you seriously believe that all circumcised men feel nothing during sex and are likely to develop difficulty urinating, chronic pain, cysts, infertility and bleeding because that is what happens to women who undergo type 3 FGM. That statement is literally indefensible.