Is that to mean that big and fast players shouldn't be allowed to play?  The comment is anecdotal and irrelevant to a meaningful solution.  In the 60's hockey players didn't wear helmets.  I don't think we want to return to that reality.  
As a youth hockey trainer today my biggest worry isn't contact to the head from an opponent, but head contact with the boards and ice.  I see this far more often with the speed kids are playing at today and it is equally as consequential when it occurs.  By in large head contact is illegal for all minor hockey players regardless of what the NHL is doing, so I believe we are already on the right track.  
If the NHL wants to continue to ignore the problem then I sincerely hope those expansion fees are being well invested because they'll need all the money they can find to settle lawsuits.