

It’s a stupid reason. Historically, if you were a peasant and had been granted access to land, you grew food or herbs. If however you were a lord, you got your food from your peasants. You had no need to grow your own food. So they could afford to grow lawns as a sign of wealth.
This has transferred across into the modern psyche. Lawns are a way of saying “i’m so rich, i don’t have to worry about sustenance. In fact i’ll throw money at it to maintain this slab of green rather than have it provide food, or shade.”
Do Japanese shinto and buddhist believers count?