But I think KC's offense may have some trouble with SF's defense.
I like the Chiefs because I like Andy Reid and I pity that team.
I have a brother who is a 49er fan so I'd like them to win for him.
So I don't think my perception is too skewed. I want both teams to win.

I think the 49ers have the better team overall. The best team doesn't always win, of course, but being the better team definitely increases the odds of winning.