This is a good post, however no matter how good the US football program gets there will always be the issue of preteen children signing with pro-teams. The football structure that exists in Uruguay would most likely never exist in the US, because people would have a major problem with children becoming professionals. That will not be replicated in the US, even in the UK you got dudes like
Walcott and Bale who were young as shyt playing for pro teams.
There's nothing wrong with admitting the best athletes don't play football in the US, that includes the best white athletes as well, those kids that had the desire to make it to the pros. You mention Klinsmann and he's even said as much -
He directly compares Football to Basketball and said it's a "lower class" sport, he's on record other times saying that US Football needs to look for talent in cities and groups that traditionally do not gravitate to the sport. I mean, it's pretty obvious who he's talking about when he says these things, he's been exposed to US sports and sees the athletes and envisions them getting world class training. If Klinsmann is willing to admit it why do you feel it's such a taboo? He's on record several times bringing up basketball players, that is the talent pool he apparently wants

So yeah, I guess you're right when you talk about identifying the talent pool, the issue is that the talent pool he wants is already playing something else.