"calls for" does not mean it will ever happen. I can understand and respect this doctor's opinion - he's a neuroscientist after all. We should always be striving to make sport safer if possible, but, of course, the only way to fully eliminate concussion would be to ban contact sports altogether, and that would suck obviously.
Continuing research will hopefully allow the games we love to play to continue whilst also striving to lower risks for those involved of long term brain injuries. One thing we can't do anymore when it comes to CTE is to ignore it altogether.
TBH, i see a lot of differing opinions on whether headgear works. Logic would initially make one think it should help reduce impact, but research doesn't really seem to support that (but does help with cuts and the dreaded ear blows suffered by rugby forwards), and can in fact provide a false sense of security.