I think you're going to get some friction there.They're right
If you want to be statistical about it, motorists and pedestrians and people who drink alcohol should wear mandatory helmets. That would be better for society's general welfare.
This ties into a couple other chats here. I explained the above point to all the farmer boys back home once. Once I went through the logic of it, the farmers grudgingly agreed, being actually clever people. They still thought cyclists were still just basically in the way, especially during baling time.
I always wore a helmet while cycling, it actually makes you more aerodynamic. Thats not why I wore one, it just sort of made me feel better. But in a bad bad BAD incident, it won't do much for you.