I’d like to see the receivers each have a chart like that to see what their reception % was in each of those target zones.
As as others have said, most of his throwaways seem to be when he’s running toward the right sideline and he’s about to 1. run out of bounds, or 2. get clobbered by the D’s pursuit.
They probably use the distance to the first down for the area “targeted” on those tosses.