I could just as easily point out that if macroevolution was a fact, beyond any reasonable doubt.... then why aren't Jewish boys born without foreskin. The Jews have been circumcising on the 8th day for how many years? Why do I still have to shave/wax my legs, underarms and bikini?.....
What!? You do realize that all evolutionists agree that DNA is the mechansim of inheritable traits? Right?
Changing the physical appearance or mutilation has no impact on the DNA. The only thing this can do is undermine the natrual evolutionary process by removing a difference in survivability (that if boys without foreskins live longer, or procreate better, then foreskins would eventually shrink as they evolve, or vice versa). By removing the foreskin you're not allowing the "survival of the fittest" to prove itself, and you end up with random genes for the foreskin area because the genes have no effect on the actual organism. This means no change.
Now if you DIDNT shave yourself, and males found you repulsive, and nobody else shaved, but the naturally less hairy were more likely to get it on, then you would be less likely to pass on that hairy gene. But once you start altering your appearance, then the selective breeding doesn't happen. Therefore evolution doesn't happen (in that specific attribute).