In today's world we are privileged with first world problems. The Egyptians had to build pyramids by hand, the Greeks had to conquer the world on foot, and today our biggest obstacle is getting to the grocery store without Google Maps.
Projectors
Why does no one know how to work a projector? People are designing apps as teenagers, building web sites, editing video with the latest software, but no one can seem to figure out how to turn on and connect a projector!