I have no idea where those figures come from, but I don't trust them. I've been watching NFL for 40 yrs and I think those figures are hogwash. How many NFL games have you ever watched?
And in soccer, with all of them running around so much, you'd think the scores would be a lot higher. They parry, dance and put on some mighty theatrics while diving to draw fake penalties, but they don't score. A real snoozefest. Then there's the intentional maiming with a head butt to his opponent by a top player like Brazil's Reynaldo (is that his name?).
However, another of the biggest problems I can see besides this lack of scoring is the power of the ref. Timekeepeing and the random nature of deciding how much actual time is left in play for the game is decided by the ref. The, at the last second, he announces some capricious edict that there is/are 2 minutes left but neither team knows what is going on.
Then there's that nasty issue of penalty kicks which decides the match. I can't go on...it's all too ghastly. In view of all fairness and sportsmanship, that's no way to decide a match.