The answers there all give a mathematical answer. The title made me think it was being asked in an almost philosophical sense (my own flawed reading of the ques

The answers there all give a mathematical answer. The title made me think it was being asked in an almost philosophical sense (my own flawed reading of the question) like: “Why does the universe impose spatial constraints such that a a cone’s volume just happens to work out this way?” But on reflection I’m not sure that’s even a meaningful question.