They do not, because
1) tournaments are an incredibly low sample size;
2) tournaments are played on specific maps that generally do not favor USF's key strength of mobility;
3) tournaments are played on the most efficient meta, but that only means that a Soviet/Brit combo was more efficient (mostly because Brits are the strongest faction atm and the Soviets have stock rocket artillery), and not that the USF as a faction are bad.
This suggests that the ufs are big problems, because they are effective only on certain maps, and completely useless on others. Therefore, top players did not choose usf in the tournament. And those who chose paid a lot, like VonIvan. By the way, he played on an open and wide map. There is a problem, and it must be fixed with a patch.
We get the largest patches after analyzing the tournaments, so stop lying and doing random auto-selection with noobs is better than tournament statistics.