Quote: vastman "I believe they do cut the risk of concussion but not by a huge amount. What I suspect they don't do is protect you once you've been concussed and are suffering side effects. So in TJ's case, it's too late.'"
You believe wrong going by a very quick google search, problem is you are not alone there and that is the problem. The misconception is they help whereas the experts say they don't and can do more harm than good. They will help stop you getting a cut head or a cauliflower lug though. One thing for sure much more needs to be done to investigate this and educate clubs and coaches. My brother looked into this a while back with his young one showing an interest in playing and was surprised to find they made no difference despite sugestions by junior club staff that they would. A bit of light reading if you fancy it....
rlhttps://www.brain-injury-law-.com/blog/scrum-caps-rugby/rl
[iDo Scrum Caps Prevent Concussions?
Although rugby players sometimes wear protective headgear with the belief that it will prevent head injuries, research has shown it offers no significant protection against concussions.
Some rugby players opt to use a type of headgear called a scrum cap. A scrum cap is ideal for protecting the ears and reducing superficial head injuries, including lacerations and abrasions.
Many believe concussions are caused by a blow to the head. However, concussions result from neural whiplash, whereby the entire head accelerates and bruises or damages the brain. Scrum caps simply can’t protect against this. For this reason, it is a misconception to believe they are effective at preventing concussions.
Several studies found no difference in concussion rates between players who did and did not wear scrum caps. Of the rugby players who regularly wore scrum caps, 63% reported concussions while 55% who did not wear headgear experienced concussions.[/i
rlhttps://www.smh.com.au/lifestyle/health-and-wellness/the-message-is-still-not-getting-through-why-headgear-doesn-t-prevent-concussion-20190628-p5226p.htmlrl
rlhttps://pubmed.ncbi.nlm.nih.gov/19127196/rl