We now have empty backfields with the QB in shotgun formation. If a corner or safety tries to jam a tight end at the line of scrimmage he'll be knocked backwards. If given some room the TE is gifted a 5 to 10 yard reception. And then you have the explosive TE who can go deep. What's a defensive coordinator to do? Some thirty years ago the word came down from a higher authority (the networks) that the games were becoming boring with little scoring. So the NFL in their great wisdom ($$$$) put shackles on the defense and that is the current product we have now. People that know very little about football think a 48-45 game that goes into overtime is what the football fan wants. Wilt Chamberlain once had a workout at TE with the KC Chiefs, an opposing coach was asked how he would defend him, his answer, we would cut him in half and there would be two 3'5" receivers. Meaning they would hit him, something that can't be done today because of lawsuits and rules.