I do believe it was LB who said something to the effect of, "if you're going to bet a dog line you have to have confidence in them being able to win the game, not just lose by how much they're given."
Plain and Simple, Atlanta will depend on a few god given miracles to win tonight. So if you play +9.5 then you're betting the game will finish within a 9 point outcome.
That's not worth -103 to bet that specific.
Unless you have confidence in Atlanta winning somehow it's either Magic-9.5 or no play.