"Why" usually resolves to "how" (if not always (in the physical world), with one notable exception).
eventually the truth/reality/answer is indifferent to the phrasing of the question (as why/how). I do think phrasing it as how makes it easier to answer(in the instrumental sense) than why. Also what is the exception, am not aware of it, please point me.
Another month, another rationality quotes thread. The rules are: