[mrraj]

I'd assume their dataset are professional couriers, <30, skewing male, which would be a high risk-taking pool. If that's the case wouldn't that make their conclusion conditional on being in that demographic? What if you're not?

Despite that, there are actually a few good examples of safety equipment causing more injury. Off the top of my head, striking combat sports have a similar opinion of headgear in sparring, it causes the participants to throw harder resulting in more head trauma. Similar sentiments with helmets & padding in football.

A bit apples and oranges with cycling as these are more example of mutually assured self destruction vs a car pulling out in front of you.