I preach that very thing all the time, and it's why I push being able to do this manually - without gadgets. You can train anyone to use the cool electronic gear, and they'll probably shoot pretty well - until a battery dies or something. Then they can't shoot. If you know how to estimate range, read the wind, and run the windage and elevation controls in your scope - then you can do all this already, to moderate distance.
It's like Land Navigation - anyone can get there, looking down at a GPS. If I take away the GPS, can you get there with a compass, protractor and a map? Know your pace count? Can you read terrain, and navigate by terrain association?
No matter how fancy the gear is, it still comes back to the basics.