I like that quote.
I used to tell my soldiers, "Technology is wonderful, when it works."
Being a technical support type, though, I know from experience that equipment fails, often when you need it the most. If you have no backup skills / tools, you're out of commission.
Not to mention that we carried a lot of weight in batteries, and the re-supply was sometimes not able to keep up with the requirement.
A map, and a compass, and the skills to use them, are still important to the ground-pounders.