Good point. Bo makes a big show of saying all positions are always open, the OP said it, open up the QB race. Open up the O-Line race. Open up ALL the positions.
The point here is that the QB position is a dominant position. A difference maker at that position can change game outcomes like no other (ref Cam Newton and Auburn). Or look at Alabama or LSU, they each have 21 superior guys, but both teams have mediocre talent at QB and hence their first game was a 9-6 snooze fest and not many are really expecting much different in the rematch.
T-Mart may be good for 9 wins a season. If that is satisfactory for Bo, fine. If it isn't, well then Bo needs to make changes.
My screaming on a message board, I can assure you, will be meaningless in the end.