Hair means a lot to people. The stuff that we basically evolved to try and protect our fragile heads from the elements has come to represent all manner of things to do with our age, style, and status.
As a result, a lack of it can be an alarming thing. Those who end up experiencing baldness against their will are usually none too happy about it, precisely because we celebrate the hair on our heads so much. Still, the Norwood reaper comes for many people eventually, at least if you're a man of a certain age. While some may choose to fight it, there's no shame in letting nature take its course. It's all part of being human, for some dumb reason.
For those who have learned to embrace a diminishing number of follicles, these memes both celebrate and complain about everything to do with being bald. Only idiots spend money on hairdressers.