This is correct. GPS tells you your coordinates, with absolute accuracy. I carry extra batteries with mine. I have NEVER seen any case where a paper map was better than a GPS unit, unless the paper was needed for fire starting. A map tells you where things are, a GPS tells you where YOU are, and usually has an accurate map loaded in it as well. If someone was going into a truly remote and dangerous area, it might be a good idea to carry an extra handheld gps unit, incase of failure or damage, but those who rely on maps and compass would be advised to do that as well.
Relying solely on technology is never a good thing, mate. Read My previous for why...