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Even if they are abused, their abuse doesn't have any downsides. These people are not growing beards.

Also, I don't even think they are necessarily abused. A lot of men are very sensitive to shaving, with degrees of sensitivity. I think there's probably plenty of guys who have perpetual razor burn and ingrown hairs and nobody cares.

[LMYahooTFY]

No idea what you're basing these thoughts on, but I don't think you understand the military or what makes it effective.

The reasons grooming standards are enforced are the same reasons anything is enforced.