Everyone is in danger of that on the ice. All it takes is one asshole that wants to hit somebody when they aren't looking. Toews can't control that. But he CAN control whether or not he gets into a fight. So limit that risk of getting a concussion by not doing it. Don't willingly open yourself up for that to become a reality, especially when:
A. He never fights, he's not a "fighter"
B. He's worth waaaaay too much to the Hawks to be off the ice for any long amount of time, let alone be sidelined with another serious head injury for a stretch of the season because he decided to fight.
Because you're right, I agree, there's already enough risk just playing the game. Just how he plays. Why fucking add even more into it with that? Why play with more fire?