Why is it everyone is treating the missed field goal like we would of lost

Why is it all I hear is that the extra point was the only reason we won the game?

Yes it won the game for us!
But we were dominating the second half and if we went into overtime we still had a better then average chance of winning this game!

Because there are a high number of posters who cannot see anything good unless the Saints win by 50 every week and even then they'd likely complain that it wasn't 51.