The "magenta line" is just a symptom of the real problem, and the real problem isn't how navigation is taught. The real problem is that the flying world has changed.
When I started flying out of the Peekskill Seaplane Base in the early 1960s the only maps I had were road maps that I got for free from the gas stations. I could fly anywhere I wanted to go with those maps. I could fly down the Hudson to New York, make a right turn and fly all the way to Florida without using a map. Just follow the coast. Anywhere I wanted to go I could follow a road, a river, a line of mountains, the railroad tracks. Then you pulled out a road map to zero in on your destination.
I remember flying over Washington DC so low I could wave to people outside the White House. You can't do that anymore. It's not allowed, it's not legal. Maybe it was never legal, but it used to be that no one cared. When I got out of the Air Force in 1973, you really did need sectionals. There were a lot of new rules, new air spaces, new radio requirements. But you could still go most places without a hassle. Now there are so many rules, covering every aspect of flying, that you can't even put all the info on a sectional anymore. You need a library full of books to plan a flight, and you need to reduce the library to a thick stack of paper to carry with you to keep track of things. And even that is not enough.
If I'm out boring holes in the sky, I still follow roads and rivers and railroads. If I have to fly from someplace to some other place, especially here in the North East, I make darn sure I have a "magenta line" in the cockpit. There are too many people, in jobs they can't be fired from, who have nothing better to do than make a pilot's life a living hell if you move two feet to the left or right or two feet up and down from where some bureaucrat deems it appropriate for you to be.
Don't be jumping on someone who uses the technology. We are all responsible for the mess that aviation is in, and things are just going to continue to get worse.