I read your post. It simply isn't true. If kids had the opportunity to play for a decent price, they would. Period. For example, in Milwaukee, there are ~50 fields available for use just through Milwaukee County Parks. You bring up AAU, those kids travel just as much as any club soccer player, the difference being, if you're poor and good, you get sponsored in AAU. In soccer, you get turned away. Soccer has been the second most played sport in the US for 30 years, right alongside baseball, both of which trail basketball by a huge margin. Kids are playing, they are playing all over. The problem is, in order to get better, to reach that next level, you need to play more, have good coaches, have a good club. 95% of it is cost, and a lack of opportunity as a result.