The cure to baldness is hit the gym and pack on 20lbs of muscle, shave your head, and stop caring.
However, his amount of muscle isn't actually outside the realm of pure hard work unlike some of the Hollywood guys.
Rob McElhenney has a funny bit about it: https://www.youtube.com/watch?v=ZPOzOanrNyg
I'm satisfied with my looks, but the heat (sun rays) and cold impact from the environment were significantly reduced with hair. I still notice the difference when I let my remaining hair grow longer during winter, and then cut it short again.
This winter I even had to wear something on my head in my apartment after cutting the hair, because I kept it pretty cool and just wore a bit thicker clothes. Except, my head.
It's a problem with sun and with cold. I now understand why people would ear it long in the past, before hats. It's such a great insulator!
Especially if you are tall, the hat will prevent you from walking into low-hanging obstacles and winding up with scars on your head.
That said, don't run off and by just any old fedora or bucket hat. Get something cool, that works for your head and body shape. Pick something that says you.
Hats, along with socks and watches, are the only accessories that men can really show personality with in this day and age. It's a real same that so much of men's fashion is so devoid of personality.