Right- so the RT becomes more important simply because the QB throws with his left hand.
The blind side argument is pure non-sense, made up by some talking heads looking for filler.
The more athletic OT usually plays LT in order to match up against the other teams quicker, faster pass rushers (both DE and LB). Teams "settle" for slower bigger guys at RT because premier OTs are impossible to find. They make the best out of the hand dealt them and run to the RTs strentgh- unless Mularkey is calling the plays.