You ever try playing football in the snow? I have and it wasn't as much fun as it looks like it would be, especially if you're on the line and you have to put your hand on the ground every play. I also had a coach in high school who didn't allow gloves for anyone but receivers, and didn't let you wear things to keep warm that showed outside of the official uni of helmet, jersey, football pants and long socks. About the only thing he let us do was put tape to cover the holes on the inside of our helmets. Playoff practices were not a fun thing.
Now imagine you are in canada where there is snow all year, and there are wolves and bears that try to eat you when you go outside. Makes you not want to play football, eh?