Helmets don’t protect you from this type of injury. 1 in 6 severe enough to result in complete paralysis. Ouch!
I guess it really depends on the trail that your on and the time of day. Imaging riding along in a somewhat dark part of the trail… the sun has set… you reach to flip your headlight on… BAAM! Over the handle bars you go. Been there done that. Not doing that again.
Of course… what sport is there that’s safe?