Yeah, but that's changing in Europe with the extension of the academies to women's play.
On the men's side, college soccer is actually a detriment to developing professional players. Subpar training and play for only part of the year. It's why the flop outs from the academy system in Europe come to play college here (they are off their academic tracks in Europe).
To the extent European women's soccer is becoming more like men's soccer, that's a potential vulnerability for the USWNT. They'll still have the advantage of a huge base of players (while men's soccer has to compete with football, basketball, baseball and water sports) so they'll always be competitive, but whether they will be as dominant as they have been is an open question. As a result, you'll have the European, ANZ, and North American team continue to increasingly wipe out the Latin American and Asian teams (with possible exceptions for China and Japan), leading to two tiers effectively of women's soccer.