Some say the US hasn't produce a world class striker because we're not big on Futsal. It makes a lot of sense to me. I imagine "indoor soccer" with hockey boards and endless nonstop play has probably slowed technical development in this country.
http://www.fifa.com/futsalworldcup/...he-football-greats-forged-futsal-1798909.html
https://www.theguardian.com/football/2016/nov/29/futsal-us-soccer-inner-city-fc-harlem
What ever happened to Mark Cuban's proposed Professional Futsal League? There were rumors it was going to be launched big, with the best players in the world and something like 16 teams.