Building out of the back is not just about your goalkeeper. It's your whole team. Teams that don't try to build from the back will have "defenders" who's sole job is to stop an attacker and then kick it forward. Their only job is defense. They don't help start the attack. It's effective at a young age. Then Suzie Thunderfoot moves to a new team because they win all of their games and Mommy Thunderfoot thinks that Suzie is carrying the team. The new coach sticks Suzie on the bench because she can't actually play soccer. Then mommy gets mad and moves clubs again or comes up with some excuse as to why they don't play soccer any longer.