Dogtrousers
Kilometre nibbler
Well it seems quite plausible to me. I'm just looking for reasonable arguments in either direction.But isn't that a post-factum thing?
I'm more interested in how people +start+ cycling. It's not as if anyone is proposing to take helmets away from people like your friend :-)
I want to take up an activity that I perceive to be dangerous. Here is a safety measure that I am informed will save my life. I'm going to view that safety measure in a positive light. It crops up in CC. Posts like "I've just bought my first bike in X years. What accessories do I need? Helmet, naturally. Do I need a puncture kit ...". Naturally I need a helmet - after all, it might save my life
Actually, come to think of it, that's another one for the list of barriers to taking up cycling - exaggerated fear of punctures.
If the exaggerated perception of danger wasn't there in the first place, it might be different: I want to take up an activity that I perceive to be quite safe. Here is a hat that makes my head look like a mushroom and squashes my coiffure. I'd feel under social pressure to wear one. I think I'll give that activity a miss because I don't want to look like a mushroom/mess my hair up/stand out because I'm not wearing one. That's plausible too.
But going back to the OP. I think you're trying to confirm a preconceived view. Taking this approach you will inevitably fall victim to confirmation bias and cherry picking of evidence - even if you make a conscious decision to try to avoid those pitfalls. Despite putting some effort into working out ways in which it may or may not be the case, I've come to the conclusion that it's unprovable either way. But it's been a fun exercise.