Because I have fallen off without them. You don’t appreciate what fantastic appendages your hands are until you jack them up. And unless you’re a martial artist or stuntman trained to roll when you hit the ground, you will stick out your hands to break your fall. Even a 10-mph fall from a scooter will mangle your paws and make it unpleasant to use them for weeks or longer. Wear the best gloves you can afford, even if they’re $10 Home Depot work ones – which actually aren’t bad.