2 different games here. The players have been chosen to fit the position. Put one of those 300+ lb linemen where they have to run continuously up and down the field and they would all be gone, replaced by a better body type individual who could do that.

As far as pads - They protect the hitee and the hitter. Get rid of them and you would see the reckless abandon go way down.

I would put The Beast (SA)up against any NFL pro if you want to start comparing individuals.