@Cunningfungus Are you having a laugh! FGM is a complete mutilation of a girl’s genital area involving removal of her clitoris and often resulting in fistulae. Sometimes the girl’s vagina will be stitched over, only to be ripped open again forcefully during sex. Other effects include infection, scarring, chronic long term genital infections, obstetric problems, urination problems and even death from sepsis. Obstruction of the vaginal opening may lead to painful menstruation (dysmenorrhea), irregular periods and difficulty in passing menstrual blood. The girl is unlikely to ever go on and have a pleasant sexual experience following FGM.
Everything you said is correct, but what you have described is a specific, and very severe, form of FGM, which is not the most common. The term "FGM" embodies a very diverse and wide range of different forms of cutting (indeed, there are many different ways of cutting the penis too).
The least severe form of FGM is "pricking" (FGM Class IV) which is unquestionably far less severe than circumcision in infant boys.
However, such arguments are a distraction and are completely missing the point. It's not a competition of "this thing is worse than that thing." It's the principle that's the important point. Common sense should say that invasive and unnecessary surgery, without anaesthesia, should not be performed on infants who can't consent.