That would have been a misreading. It was a direct response to Papa Toms "i insist that my riding companions wear one..." comment (not directly quoted).

That's the kind of asymmetry I was referring to.

Those who don't wear helmets don't care, but many who do wear helmets are comfortable in urging others to do so.

In the summer, I get asked "where's your helmet" on a regular basis. Depending my mood I'll ignore them, or may respond with something like "it's the new invisible model" or "same place as your manners".