Don't you see how absurd it all is, though?? It's a full contact sport. It doesn't matter how much space there is between players on the bench, when they are on the ice crashing into each other, sweat and spit flying, and what about when there is a fight? Or even when players all get in a scrum on the ice and start pushing and shoving?
Imagine one of those super slow-mo videos where they show droplets / particle transmission - when people are having a normal conversation. Then imagine how crazy it would be when you're playing a full contact sport and expending as much energy and effort as you can?