Goat
no advantage to wearing a beret or SD hat at all. It serves no function apart from identification and appearance. But it is uniform and that is why we wear it. I am a fairly black-and-white individual, so either we wear hats properly or do away with them altogether. Until they are done away with, we should wear them properly and that may involve wearing them on Service vehicles. Funny that is not difficult for the army to wear berets driving for hours down the motorway....
I know it is a faff, but it is not difficult either. You say focus on the important things in life - absolutely - is it gonna kill you to wear it? If that is the way the staish wants it, crack on and don't moan too much.