Okay, let's break this down...
Cystic Acne: could possibly cause disfigurement of the face if not treated
Myopia: well, true...you don't need to have contacts except in extreme circumstances where glass/plastic lenses would be too heavy for strong prescriptions
Misaligned Teeth: keyword "misaligned", not in proper alignment, possibly interfering with mandible growth.
Fungal Infection: keyword "infection", not supposed to be there. I've had a fungal infection for decades, and it causes very painful ingrown toenails
Prepuce: normal part of the male genitalia, might possibly lead to normal sexual sensation if left alone
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Okay, taking the acne consequence to its extreme (disfigurement- not very likely, but I'll go with it)... even then, what would be the "medical need" for preventing said disfigurement? So that the child doesn't grow up to look different then everyone else. The fact remains that the only effect is psychological.
The vast majority of overbites do not cause any serious issues with mandible growth. I've had a huge overbite my whole life (sucked my thumb well into elementary school). Mom took me to an orthodontist when I was eleven who definitely recommened braces, but we never got them because she couldn't afford it. Guess what- I'm fine.
Toenail infections- please, entirely cosmetic. Whether it "should be there" or not, it doesn't do any harm. It just looks gross. I've had one since I was a kid, and I've never gotten an ingrown on that toe. Never heard that there was a causal link before...
All these other commonly accepted medical interventions carry some risk (accutane- that's obvious; contacts- more risk of infection than with glasses; lamisil- possible liver damage, among others) and yet no one seems to have a problem with them (myself included.)
I'm just trying to establish that parents have the socially-accepted ability to choose medical interventions for their children solely for the purpose of preventing/alleviating cosmetic and psychological discomfort, and so if this is their reason for choosing a relatively harmless and culturally accepted procedure like circumcision, then so be it.