I agree with the sentiment of this statement, we all know it is true. But you can see the FAA written as a gentle push to go a little deeper into your flying skills. There is no way a test can be written that contains only useful bits of material, they have to shotgun the subject list and hope it is representative. Worst case you have to study some outdated ideas and techniques, but a little knowledge of prior navigation techniques is not all that bad. I do not like to see students who have no interest in an E6B because they see no daily use for one. I know they are going to be lazy pilots with little or no ability to calculate anything they are doing in the air. I do not really care all that much about E6Bs either, but I do care about the mental discipline the devices can help develop. Same with many of the outdated FAA questions- the mental math you do working these problems can definitely make you a better pilot. Flying is a thinking game as much or more than a video game.