It's not unfamiliar, you got it right, the map I'm talking about is exactly like that maps you described, in that they both contain directions (all the possible origin-destination relationships between all the places) and you can draw arrows from one place to another (thereby defining a "route" that represents the act of starting to walk from point A and arriving at point B). If you cared to learn you would benefit a lot from it.

Oh, but the moral of the story is that because the computer understands those maps, then I can simply tell it what I have (point A, origin) and what I want (point B, destination) without telling it how to do it. Then the computer goes and writes that code for me! The same code you're now still writing manually. Because you don't want to learn a new "trick". :)