Also I don’t find it very compelling if climbers tend to die on easier free solo climbs rather than harder ones. I don’t really care what the grade was on a climb if it kills me.
there really aren't many that have died, maybe a couple dozen, so not much stat to draw info from. BUT they aren't always on the hardest routes, so the law of averages would dictate that they die on "average" difficulty routes.
You shouldn't climb at all then. People die just scrambling too. Even hiking can be dangerous.
Do you wear a helmet when you drive a car? That might actually be sensible. It's probably just too 'weird' for almost anyone to seriously consider.