oldskool said what I meant to say but didn't -- no, don't ask why what I said came out, I don't know either.
It's the same reason hockey and basketball declined in the 90s -- coaches became so obsessed with tactics and running set plays (don't get me started on the evils of the offside trap) that the players were being stifled. I mean, if you had a national football team with so much class at every position, would you insist they do 5 behind the ball, offside trap, 4-5-1, slow building play? Or would you say "I have the best athletes and the best players" and just let them go nuts? (Careful, Stevie Mac, your future may ride on your answer.)
Meanwhile, from the "maybe this game is catching on in the US" department: