Because if Aaron Rodgers started from day 1 he may lumped in with such names as Couch, Carr, Smith, etc...
There is a long list of QBs that started before they were ready. Would they have been successful if given time to properly developed? One thing is for sure, Tannehill is not in the same class as Luck or RG3 right now so to base Tannehill playing on what the Colts and Redskins are doing is rather foolish imo.
You hit the nail on the head! I couldn't agree more. They need to make sure the offensive line is in place first and not to say that the other guys are sacrificial lambs, but Garrard and Moore have NFL experience and have seen what the pressure (pass rush, speed of the game, etc) can do. I would much rather not see the possible future of the franchise get his ass handed to him behind the swiss cheese OL and become a deer in headlights like the others mentioned above. Always though Carr got a huge bad rap and basically the guy got murdered behind the Texans garbage line.