The brain is a theorizing, story-telling machine. Is the latter peculiarly human? Once you can spin a narrative, you acquire the concept of “why”? You look for ultimate causes. But, I am reminded that Asa Gray (review of darwin) criticized a theist, as “.. considering only the ultimate ‘why’, not the proximate why or ‘how'”. In truth, there is no ‘why’, there is only ‘how’. ‘How’ is the laws of motion. ‘Why’ is a referral to cause. Physics knows no causes. There is no ‘why’ (best said in a Bruce Lee voice).