No, i played rugby in high school a few times and have played more than enough football in my time to know you're looking at a very tame version thereof - i've never once went down without justification and would die before doing so, we play properly, what you're looking at is as i said, the overpaid nancy boys, semi retired guys or people more interested in how they'll look in the nightclub.
I have seen a WR/RB running full speed, it's impressive, but like i said, i've seen footballers every bit as fast including several that are that speed with the ball at their feet and some who WILL run shoulder to shoulder with defenders without going down. You don't seem to respect the fact that those guys are fit, they don't do it by accident - but i'm not going to convince you when clearly, you're not open to understanding the game.
Also helmet to helmet hits - kinda illegal these days.