That's the point, if a left front blows, its instantly headed to on coming traffic, because of slight increase in rolling friction, but mainly influenced by a ride height loss resulting in artificial turn banking, requiring an immediate correction, that depends on a lot of steering traction that has been sacrificed with the blown now outside turning tire. The factors mentioned above with a front tire blow out do not exist or are much reduced or don't exist with a rear wheel blow out.

I suspect the danger is increased by the simple suddenness of a front tire blow out, requiring absolute immediate steering correction, which also I suspect is usually an over correction by a shocked driver. A rear tire blow out situation takes relatively time to develop, unless driver is in a turn or heavily on the brakes, which effects both situations front or rear