Why Would You Use Post Instead of Get for a Read Operation?

I feel like arguments about REST are sometimes like 4-element philosophy [1] or wuxing [2], which try to classify or decompose everything in the colorful world into a given set to prove the wiseness of the set, which seems not the case.

I know nothing about REST, so forgive me if I am wrong.

[1] https://en.wikipedia.org/wiki/Classical_element [2] https://en.wikipedia.org/wiki/Wuxing_(Chinese_philosophy)