I think it's easy now to say that he should have thrown to anybody other than Edelman, but the Broncos definitely deserve some credit for playing it perfectly. Edelman is supposed to legally pick the defender on White, and either because of a great read by the second defender or a preplanned double team, White was covered when he wasn't expected to be. In that moment, the easy read was that he was covered, and it seems that in that instant Brady didn't care to decide whether or not he was covered well.