While not my thing and I don’t understand the craze for beards, what is the problem with beards?
As for cadet bum fluff has been around for as long as we have existed as a species, so shouldn’t make any real problem. It’s a parental or even cadet thing to sort out. Our son started shaving as soon as he got the first wisp of lip hair, with no comments from either of us.
We were told years ago the beef around beards was about not getting a proper seal with respirators, but I thought then, it would only make real sense a couple of hours after you’ve shaved, after that daily growth would compromise the seal. Plus all the crap people would have on their face wouldn’t work properly. Then there were the RN who could have beards like one of my mates did.
I recall a big fuss being made about hair length and tattoos and IIRC there was a relaxation to avoid people in the services looking like people in the services and attracting the unwanted attention of certain groups.
Again in an organisation with so many problems … this is not that big a deal. Most people know if they can grow a reasonable beard if it floats their boat.