It's definitely not. No one is arguing that cutting the clitoris off boosts their health, it's done to reduce their enjoyment of sex. And conversely, who says I'm going to circumcise my son to reduce his sex drive?
I was circumcised later in life, circumcision improved my experience in sex.
Circumcision also reduces infection, and spreading infections to partners.
Also, there's many different ways to injure the foreskin during and it can get in the way of having a full sex life. My cousin is one such person. He's always cautious not to get carried away because he's injured himself a few times. Some have tight or overly sensitive frenulums, and some have torn their foreskins. Or suffered with chaffing and other problems.
I'd argue that it looks better, but that's just my subjective opinion. Others like the look of foreskin.