There isn't a mandatory helmet law in NM for motorcycles and you see maybe 50% of the rider wearing them on the hwy with the speed limit 65-75 mph. It is a litter higher rate of around 75% for bicycles the usual places I ride (road/MTB is higher %, hybrid/comfort bikes way low). I always wear my helmet and eye protection, bright colors, blinking headlights when I share the road with vehicles, and no earbuds when riding.
I wiped out on my Radrover going too fast on a tight turn on a single track dirt trail that was a little soft and muddy. I ended up snapping the two upper stem bolts and bending a 3rd that secures my handle bars to the stem. It happened so fast, I didn't have time to do anything other than land on my back shoulder and bounce off the ground. Not a lot of fun riding home +4 miles with a floppy handlebar. I think what save me from more serious injury was I landed partly on my large Osprey back pack, the trail was a little soft from rain a few days early, wearing a heavy winter riding jacket, and I was wearing a helmet (head did bound of the ground). Just had a slight bruise on the shoulder and soreness for a few days. Could have been worst because there are spots with tree stumps/roots and rock on the trail.