I remember a scene from "The Love Boat" of all places. The ship's doctor, a GP, and another doctor, a specialist, were arguing.
Specialist: "GPs know less and less about more and more until they know nothing about everything."
GP retort: "Specialists know more and more about less and less until they know everything about nothing."
This was a great example of the explosion of knowledge we've had in modern times. GPs can't keep up with everything we are learning, specialists focus their knowledge. As patients we are required to navigate this landscape.