blind side tackle isn’t what it used to be, and was not as big a deal in the cfl with 5 ol and no te. Plus, with the massive prominence of pistol and shotgun up here over the past 20-25 years, you haven’t been able to sneak up on and burry the qb from behind. From the pistol/gun you have equal view of the ends through out the whole play. Down south, especially in the past, they played a massive amount of passing snaps from under the gun, and once you turned to throwing position and took a step back you turned your back to the rusher on the lt side. Because of that, in the nfl, they heavily pressed the end on the offensive left side to be a premier rusher. but that passed down there 10-15 years ago. The Rt side was often the run side and so has the te a lot of the time on his shoulder, which helped as well.