...When you learn as a child, you know that you have to practice. Adults who never studied instrumental music have no concept of the discipline required...
Actually, I've noticed a correspondence between students who learn well to dance tango, and those who practiced any sort of discipline as a child, whether it be music, a sport, baton twirling, skate boarding, maybe even some mental disciples. They seem to understand that gradual continual progress adds up to superior skills.