Everyone overestimates the actual size of Egypt. On the map it's pretty big, but in reality, it is tiny. Most of the country is desert, empty and barren. There may be water out there but it isn't readily available. There isn't any electricity or service or even roads outside of the oases, so people build in the Nile Valley, which is narrow enough that you can see across it anywhere south of Cairo. Someday it will be gone.