It's all a part of the ME generation. The world of sports has become all about the personal player,not the team. Players run away from their teammates when they make a great play now so all the world can see how great they are. You see it every game as their teammates are trying to celebrate with them, they seperate for all to view their greatness.
This has nothing to do with showing emotion. It has to do with selfishness and ego.
You may be right about one thing. I've loved this game, this team for almost 40 years. I watched Jack Kemp get carried off the field by his teammates and the goal post come down in the rock pile. I stood and sang with a bunch of players when they ran back out of the locker room in 1980 to celebrate with the fans. Players cared about the team and the fans.
Those days are gone, I guess I am an old man.