Unknot your panties.
There are more non-Saints fans bitching about this than Saints fans. Further, there are even a few SEAHAWKS fans questioning the situation.
The Saints should have taken care of business during the regular season (inexcusable losses at AZ and Cleveland, "coulda-woulda-shoulda loss in week 3 to Atlanta), if they had, they'd have home field advantage. I am not happy about the situation, and don't think that the 'Hawks have any genuine right to be even PLAYING this weekend, much less hosting a game, but the bottom line is that the Saints played themselves out of hosting games and a bye.
Now they gotta take care of business on the road - at least for the next two weeks (if Green Bay wins in Philly & Atlanta - both games they CAN win, and NOLA wins out, the NFCCG is in the Superdome again). If they don't then they don't deserve to make it to the big dance this season, and they have no one to blame but themselves.
(...see, I am capable of being rational...

)