There is some logic to built-in destruction as well - raze the forest to nourish the soil, bring the storm to clear the stagnant air, that sort of notion.

[Inari rests his chin on his palm, idly tapping his jawline with his fingertips.]

Wouldn't it be a shame if the answer was as simple as... "well, gods can become madmen just as easily as humans," and the one who happened to lose his mind had destructive chaos as his dominion? With a different roll of the dice, we might've had a profusion of nature or a baby boom instead.