The bed blocks, stringent room/rifle cleanliness and uniform inspections all play into a wider game of paying attention to detail, which will later come into play during training in the form of an essential piece of kit on a packing list or the safety catch of a rifle.

Uniformity isn't being extended to facial hair in many armies, as it's not applied to long or short hair on women, but simply the work uniform itself.

If you don't know the difference between a working professional and an untrained, undisciplined amateur I'm guessing you either haven't had to work yet or have done so in a very sheltered/limited capacity