Ouch!
I've worn helmets my whole life. I spent 2 hours in Arizona once with no helmet law, and took it off and it made me very nervous and sunburned my nogin. I've always lived in helmet states. And I've never since taken it off riding through no helmet states.
I started out on 3/4s (and with all my dirt and motocrossing), but went to halfs (DOT) for 40 years. I've been down just one time sliding down the road (not counting drops and tip overs), and never touched my helmet. From playing hockey on ice as a youth (with no helmet), I learned to always tuck my chin into my chest hard whenever I fall, so I don't bonk my head (and whiplash my neck).
Course, if you're doing
the rag doll tumble, there's no telling what may happen.
A helmet may or may not save your life.... but you'll almost certainly look better in the casket.
My favorite helmet saying (about those novelty skid lids)..........
Yeah, get a $5 helmet for your $5 head.