What you are talking about is the risks that players take out there and you basically have to live with them, can't avoid the issue all together.
While we've learned new stuff about concussions, concussions are nothing new at all. I was warned of what could happen if I were to play football again after sustaining one, as a teenager. I understood just fine. These are adults.
As far as the business perspective goes, remember, "business" bottomline, 1) teams are insured for players, 2) injured reserve doesn't count against the cap in such a way that if it were long term the player could be replaced presuming value is the same or less regardless of cap status.
Fighting, hitting, is part of the entertainment value of hockey, along with core parts of the sport itself.
The politically correct aspect is not criticizing the league for it's excessive nanny-like handling of concussions, because if they didn't take it as such, the media would be all over their ass. It's pretty similar to the PC flipping out over a fan tossing a banana on the ice. If the team doctor, who is there for a reason, says the player is fine, let them play. Whatever happens to the player when they're retired, they knew the risks of playing a physically violent sport, and much like those who fight for the UFC or box or even do fake rasslin' for WWE, there's little logic in blaming others -- they're paid to take those risks, not skate around in such a politically correct safe manner.
Obviously the problem is leaving it up to a league's rules when players understand that a concussion, like any wound, might have other complications beyond that. Laich's attitude comes from the fact that playing in the NHL is certainly a risk as far as physical health goes, and guess what, if you stick your face out there to fight, or play stupidly and keep your head down admiring a pass or following the puck without paying attention, take a random puck to the head, lose one's balance and hitting head in the boards, and one of the many other ways for such an injury to happen, that is part of the inherent risk of playing the game, and one cannot ever guarantee safety in such a fashion given the physicality and speed of this sport. Players aren't that stupid as to not know the possible consequences, just because we're now learning more about the long term effects of concussions. This is getting well out of hand, and I'm glad Laich spoke out about it.
But what Laich really doesn't like is the protocal about having to go get checked out and cleared before you go back out there if you take some sort of head shot. Beagle was knocked unconcious and had to be helped off the ice. I'm sorry, but why is there a problem with then having to go sit a few minutes and get cleared before heading back out there?
Ingoring the players own stupidity and not caring whether he has a quality of life past the age of 40, ignoring potential impact on his kids, etc, I'll just take the blunt approach. If I'm the owner of the team and I have invested millions in this player and I have him under contract (guaranteed) over the next 5 years, I don't want my investment risk to be beyond what it inherently has to be.