Here it is need noun 1. a requirement, necessary duty, or obligation:
I could be wrong, but if one were to word the sentence, "We are required to choose..." or "We have an obligation to choose...", the meaning is clear. It is perfectly logical and reasonable to interpret the sentence using the primary standard definition of the word need. Unless, of course, you want to make this (honestly) bizarre claim, "... it never occurred to me that you were interpreting "We need" in a non-standard English way.", under what circumstances is it possible that the primary standard English definition of a word is (objectively) "non-standard"?
Or this. Not once, but twice the below claim is made