Hair is helpful yall!
For one... regardless of how "advanced" we are... long hair tends to be a differentiating marker for females. Short (especially clipper-guard short) for guys.
It helps you stay warm. I've taken to wearing a hat to bed... at least until I'm warm enough to deal with not wearing it.
Cushion. Have you ever considered how many times we knock our heads? Hair is a nice bit of protection from those knocks and bumps.
Sensory overload. I've experienced greater issues with sensory difficulties since I shaved my head. Strange? I'm not sure. It seems like I'm not able to process information from my environment as well. I feel like I'm overloaded much of the time and just want to hibernate!
Did I mention the warmth factor? Yeah... given that it's turning winter around here and I'm still more Florida acclimated... hair was really helpful!
Feeling pretty... or, at least... feminine. I'm not a beauty. I know it. I don't wear makeup because I choose not to afford the products I would be willing to wear (not stuff from the drug store, that's for sure!). I don't really wear jewelry. So my long hair was really my only adornment... and I didn't style it all up or anything. It was just there. Usually in a bun on top of my head.
Anyway... I was looking in a window (in lieu of a mirror) while I shaved my head and I realized to a lesser degree (than when I saw myself in a real mirror) how rough I was going to look and I started crying and repeating a mantra that I need to say to myself much more often... "Hair doesn't make me pretty. I am more than my hair. I AM more than my body. Beauty shines out from within. I don't need hair to feel pretty." *sigh* It sure helps, though.
Be kind. You never know what battles someone else is fighting.... or what troubles they are working through in heart, mind, or soul!