We can only logically assume that they are trying to cover a large land mass or protect several cities or towns and areas at the same time and that these people will not work 24/7 and likely be rotating on and off of schedules.
This becomes far more believable when you start taking in the deployment into consideration.
This all being said I do not condone anything that Hamas and Israel has done, it is a saddening Affair all around.
I'm sorry but you do not sound like a coffee person. I cannot comprehend a world where I live in where I get tired of my beverage of coffee after 15 minutes because it became disgusting.