I don't think Draisaitl is attempting to injure there, its just a pissy little bitch acting up. Its an unusual play to say the least, but penalizing someone for what could have happened jad things gone differently is not on par with something that DID injure someone.
Kaliyev got smoked, got up, skated straight at the next Duck he saw, the Duck attempted to get out of his way and Kaliyev thrust his knee out to make contact, injuring him in the process. The injury did and should lead to a more severe penalty.
They aren't comparable events.