Receivers in the NFL have to catch balls traveling at 60+mph, and running backs have to run through tackles, have great agility and decent speed..............all while holding the ball.
But all in all the NFL is an American sport, watched by Americans, and rakes in huge dollars, media, sponsors, and also charity groups. As much as soccer and rugby are more popular around the world and in other countries, what the players make and the impact as sports pass time pales in comparison to the NFL which is unheard or unknown in many countries.
I like that America has it's own football and wouldn't have it any other way.