Well I just moved to Texas, and one of the very first things I noticed is that motorcycle helmets are voluntary.
A lot of people ride without one here.
Back in the late 80’s early 90’s I lived in Florida and they had mandatory helmet laws. I saw “bikers” riding around with Kaiser era German helmets. I guess a helmet is a helmet regardless of the metal spike sticking out of the top.
I’ll stick with my Simpson, unless I feel like a cool down ride after working outside in the summer. At least I have the choice.