Yeah some random blog from keen bikers is really debunking it all globally, including common sense.
I don't get this fanatical defense of no-helmet-at-all-fucking-cost stance many here often express. I personally know a person who died in bike accident helmet-less, she went head first due to slamming front brake too hard, straight on the head on tarmac, no complex situation, it was more than enough.
I had similar situation - new xc bike bought cca 2007, for the first time buying helmet, spent whole childhood and adulthood without one. Within 3 weeks, I had to slam brakes on narrow winding forest path due to my GF stopping abruptly behind the corner. Don't have memory of that situation, remember opening eyes while laying on the ground, looking at crumpled helmet and visor, and seeing how my forehead went perfectly into a sharp stone sticking out of the ground, not much cca 5cm. More than enough to kill me, and GF told me I hit the ground with quite a bit of force.
I have friends with broken collar bones, shoulders, wrists, scars on heads, from various common bike situations, mostly in the city. Many were skeptics, all of them wear helmets now (sometimes due to hard push from their SO). Most of our friends are doctors due to my wife being one, every single one of them had to do some time in emergency in biggest Swiss hospital, and every single one of them had seen rough head injuries including death from all those folks who swore to never wear helmet, it limits their view (bullshit), their senses (huh?) and so on.
Every single sport facing death risk is maximizing their survival chances by smart behavior and better equipment, which often include helmets. But somehow these folks feel like (since this is hard emotional debate, not factual one) they are outside normal risk envelope thats valid for every single living thing on Earth.
But sure, don't wear the helmet, but lets agree you will cover full lifetime costs of any injury treatment to head/neck/shoulders, including all after care due to permanent disabilities. And don't whine when your kids die because daddy was a bit fanatic and picked up wrong hill to wage their insecurities/arrogance battle on.
Yeah, it's funny that some guy who baselessly claims that "99% of bike fatalities involve car crashes" (when people say "99%", odds are that they are pulling it out of their nether regions) then says that a study cited by the American College of Surgeons (which only says that "one study suggests") "has been thoroughly debunked", offering a citation that doesn't say that. What it does say is that the number from the study hasn't been replicated and other studies consistently show lower numbers. How much lower? It doesn't say. But one thing that is clear is that our drunken correspondent is himself highly prone to exaggeration.
And he notably has nothing to say about any of the other numbers and consequences mentioned by the ACS.
P.S. The 1989 "debunked" study isn't even what ACS cited! Their citation was an overview paper that used a broad range of studies: https://pubmed.ncbi.nlm.nih.gov/10796827/
That one study has been thoroughly debunked...yet decades later it still gets cited.
https://www.seattlebikeblog.com/2013/06/04/feds-no-longer-ba...