I understand why you are in a state of ennui...you want to know why you should eat, and doltoids like Yigg tell you what you should eat.
You shouldn't eat...it seems a rather pointless, empty gesture, given all the effort involved, the cooking, the chewing, the swallowing. If you can, I recommend finding a video of a person being x-rayed while chewing and swallowing. It is a wholly disgusting act.
And then, of course, is the hideous aftermath, where all the "unusable" bits decide to pass their way through you. Sometime not smoothly, but with great effort. Bleeding hemorrhoids erupting as corn kernels burst them open.
Good lord, man, spare yourself the horror that is eating, at least for a day or so...