Our city is now trying to put a helmet law into place for kids and is offering free helmets for same.
My ma's early onset (in her 40's) dementia was attributed to a helmetless crash when she was a teen around 1963 or so.
Our kids lose riding privileges for 2 weeks if caught riding anything on wheels without a helmet. We do not ride without our helmets. My 5 year old son will yell "HELMET" at you if he sees you riding without and that's fine by me.
Wear it.
I used to have an open mind but my brains kept falling out.