Is that really why you think – that everything’s merely a test, rather than having actual meaning? That kind if flies in the face of a lot of Chazal and most of Sefer Hachinuch, no?
Also, have you addressed my chilluk between “should” and “would”?
There has to be a point at which there’s no more “Why?”, otherwise, ein l’davar sof. I could just as easily ask you “Why should someone do something for his benefit?”, and there no real answer other than to rephrase the question.