I would wear a helmet on a motorcycle. Some give the argument that a helmet restricts vision. Perhaps some think it is “uncool”. It is most uncool when you go sailing because your cycle stopped but your body continued to move at the speed you were doing.
A friend of mine went across the hood of a car while wearing a half helmet with a sticker on it that said “Helmet laws suck”.
After about two years of plastic surgery to put his face back together he went out and got a full face helmet. He still disagrees with helmet laws but these days he says helmet laws only protect the stupid, the smart guys are wearing helmets and don’t need to be protected.