If you feel playing outdoors in a cold weather climate = advantage winning the SB, I guess you're welcome to that belief.
Wanting to have a roof on our stadium doesn't mean in any way shape or form, that I or anyone else who wants a roof, would rather host a SB than win one.
I'd love for us to win one. I'd love it even more if we won it in our own stadium. But I guess there are those who believe we'll never win one unless we play outdoors like the Packers & Bears.