Headgears are only really good for avoiding superficial injuries eg cuts and grazes, best thing to prevent concussion is, from memory, a mouthguard.
Rugby League has been very lax when it comes to player welfare and concussions. Endless times in the past we've seen players groggy as anything, knocked out only to later appear on the field again. This has to stop. Even the one week off afterwards is probably not enough.
As mentioned above by eozsmiles, when they're getting put back in the field in a groggy condition, probably unable to make a rational decision, that's when it comes back on the clubs and the competition as a whole for displaying negligence towards their players.
As mentioned also, doesn't seem to be a money grab, more a warning to people. And until the clubs start dealing properly with concussions (which it seems they finally are taking steps towards doing) this is an issue that will keep popping up.
I really don't understand the 'unable to make a rational decision' argument. I've been concussed 4 times and played on twice, both times I knew I shouldn't have but I did. You're pretty aware there's something wrong. A lot of rugby league players play on regardless of their safety and we all know that. If they play on with obvious broken legs and broken jaws then they are going to play on with a headache and fuzzy eyes.
The new concussion rule they have is great for that reason. But I can guarantee most RL players would not sue from damages from concussion, because they make a clear choice to play on. That's why I would never sue despite suffering concussion and ongoing neck injuries from legal tackles. It's my choice to play and it's my (stupid) choice to play on if I get hurt.