It's gotten a little better recently, but I remember about 20 years ago when most children couldn't tell time on anything other than a digital clock and small children couldn't tie their shoes because of velcro.
We rely on computers for everything today, but the mathematical equations for the atomic bomb, jet aircraft and much of the space program was done with slide rulers. As you pointed out, we have the most advanced engineering programs imaginable today, yet nobody has been able to produce a reasonable theory of how the pyramids were constructed.
I always felt very proud of my father who worked on the Space Programs of the 60-70's. He did his work on a slide rule because computer time was so limited. It was not until the engineers felt they had the formulas correct that they ran the full launch process through the computers. Dad would spend weeks making sure the input code was correct, then it would take weeks for the computer to do the processing. When there was a problem all the engineers would pull out their slide rules. It was not until about 1975 when dad came home with a TI Calculator the size of a paperback book which could take the Square root to three decimal places plus having trig fuctions. Us kids were not allowed to "play" with it, meaning we couldn't do our math homework on it!