Ok, draw a dog’s head. Now draw a cat’s head. Chances are, you drew the dog from the side and the cat from the front. Now draw a horse. You drew it from the side, not the front or rear. Now draw your hand. You drew it with all the fingers separated and extended. How often do you really see your hand that way? Now draw a picture of your house. You drew it from the front, not the side or back or from the top.
The Egyptians were no different than you; they captured the ESSENCE of whatever they were depicting, not the day-to-day random views they actually saw.