I agree. It's not normally 'necessary' (although sometimes needs doing for medical reasons). However, it can be vitally important to some people.
My husband for example. He has talked to me at length about this. In his culture it is - traditionally - when you become a man, a warrior and an uncircumcised man is not a warrior. To them, they are helping, they would be cruel to prevent a boy from becoming a warrior, if that makes sense.
Nowadays, it tends to be done in a hospital, but it still matters, at least to people of my husband's generation. It has significance, it is a transition. To the younger ones, I think it is just 'normal', it's what you do and they don't think about it, but it seems to me that they don't have the same "become a warrior" mentality, iyswim because they tend to get it done at birth instead of 'manhood'.
My husband had it done at 14 - without anaesthetic - in the then traditions of the tribe!
He was adamant that our boys must be circumcised or they would, in his words, "never be accepted" (by the kikuyu as kikuyu) We had many an argument over that, I can tell you.
Vitally important to him that they be recognised as 'men', vitally important to me that nobody goes near my babies with a fecking scalpel!
In the end, we agreed (well, I went on and on and on and on and on and...) that nothing would be done until or unless it was their choice. So when they are old enough and understand enough, it will be explained to them and they can make a choice. I think that's fair.
But the point is, don't underestimate what it means to some people. They truly don't see what they are doing as a bad thing.