No one is injured in the SHL because they're like the X-Men of hockey. All were genetically tested to play in the SHL due to their super healing abilities and inability to take injures. Most found out during their youth upon their first boarding, or in an incident unrelated to hockey, and switched gears in order to train for the SHL. It doesn't stop them from aging though, which is kind of bogus, but they still lose skills as they age despite retaining healing properties. It's definitely useful outside of hockey, and all players usually do their own home improvement and aren't afraid to take risks for any reason, even during playoffs. Some are into skydiving, cliff jumping, and other extreme sports. Still, getting hit hard hurts and most try to avoid the biggest bruisers anyway, even if it won't take them out of the game or season. Better to play smart than play to get hurt and hurt others.