Writing, simply, is an archetype. Something the species does. It's akin to doing a yoga pose, stretching carefully, muscle and bone aligned, pulled back into proper place and good posture. One cannot avoid smiling like the Buddha when in lotus position. And so one writes, and it's good for the body and mind.

What do we achieve when we write? Maybe we find something along the lines of understanding the real necessary pabulum of daily existence, what it takes to nourish and feed us in our dealings with a society more random than it seemingly should be. You'll know better that very difficult thing, that is, what to do with yourself, both on a daily basis and in general.

Perhaps good health is a part of one's retirement plan.