It’s a calculus thing. We can only give the expression a value if we know the functions giving us a zero value that are being devided. For example if we were dividing the function (X) by the function (X^2) at zero our we would get infinity (Wikipedia has a pretty good page on indeterminate forms).
You could also think of it like multiplying both the numerator and denominator of a fraction by 0. This should preserve the fractions value, but multiplying by 0 essentially erases both values so we can no longer know what the fraction equals unless we know how both values came to be 0.
The idea that humans are fundamentally hierarchical and competitive creatures is just wrong. Of any indiviual trait could be said to be the character of humanity it would almost certainly be cooperation. Practically every hierarchy that humans lives takes a ton of organized forced to uphold, specifically because living in hierarchy is not natural for humans.