Nothing personal here. I'm asking for any research that shows cycling results in more head injuries than other activities. You've replied that you don't have any and don't care. I'm curious as to why. If you don't know of any elevated risk but want to wear a helmet I thought that was curious as I find the phantom risk of head injury on bicycles is more fearsom as the equal risk of head injury elsewhere.

I'm not saying you aren't entitled to your feelings or views or making judgements on them. I would like to see some substatiated findings that riding a bike makes you more likely to hit your head than other activities. Until I find this, I find all the stories of head injuries on bicycles no different as all the other stories of the same happening to others, resulting in assesments to my overall risk and if it's worth it to make some adjustments to lower the risks, or if the risks are low enough to not let it concern me too much.

If there is no elevated risk, there is no need to elevate my concern or take elevated measures to avoid a head injury.