it’s not just beards.
it’s part of the general trend towards an aesthetic that celebrates ‘authenticity’ – and has been going on for a good few years now.
See also the rise of craft beer – good old fashioned, local ale etc. Dressing like a lumberjack – because you’re a real man who kills bears and chops down trees. Eating pulled pork and artisan burgers and other such unfussy, back to basics nosh because etc. The whole log cabin, Americana, rustic / shabby chic, have a stove, bare wood floors vibe – because in another life you’d basically be a pioneer in the American West, not an accountant in Cheltenham.
It’s part of the aesthetic of our time in the same way that brown was in the 1970s and chrome and glass and snazzy red bits were in the 1980s. It’ll be replaced in time.
But you can probably see the appeal; it’s arguably a reaction to the homogenous British high-street, the realisation that whatever career you see yourself in, the chances are it will involve sitting in front of a computer all day, and if you’re under 25 you can forget any ideas that you might ever own a house or retire. **** it, you might as well get a semi-ironic tattoo and at least there’ll probably be some decent ales down the local