if you were so confident you would make the bet more fair but no you aren't willing to take the chance
Fair bet? It's not that complicated. You opened your mouth and said Pittsburg would win their 6 SB this year. All I'm betting is that they don't make it to the SB.

no matter how great the team is it isn't smart to take one team against the field
Lol, say what you want, but I had enough faith in my team after their 3rd SB win to go out on a limb and bet my then boss, in front of everyone at work, the the 9ers would win back to back. I bet that if I lost I would let him SHAVE ALL MY HAIR OFF MY HEAD. Back then I had long hair. If I won, I got to shave off these Elvis looking sidebrns off his ugly face. Lol, we all know what happened.
Pittsburg isn't playing 31 teams and they only play 8 outside of their division. The field isn't that BIG.
Since you're UNCONVINCED that Pittsburg can't "beat the field" what do you suggest as a fair bet? Remember based on your PREDICTION, it's got to be a strong.