Looks at CJB, Hawks and Sharks, crap teams tends to have more injuries than the average. That's because depth is poor. The good players get overplayed or have to deal with more focus. Those teams are loaded up with AHLers or NHLers at the end of their career and the bad players are playing above their level. You just get a chain reaction of injuries or lots of players who avoid injuries.
Habs depth is awful. Gally is broken, Evans is soft and injury prone. Anderson lost all effectiveness to try to stick around longer. Dvorak is made of paper. Pezz is not an NHLer. And if they get injured, you call up AHL tweeners/prospects to replace them...
In other words, on a good team, Laine's injury should only be sad, not the end of the world.