In some places, there is nothing to eat except grasses. But if you own a yak, you can
turn this into food and materials, and survive.

Yaks are the center of the lifestyle, everyone is a connaisseur of yaks, yaks are status, wealth,
they get you to work, they are the cars of Tibet, yaks are survival.

Or rather, in california, our cars are our Yaks.

This is how I came to peace with the role of cars and petrol in the US. Car worship is analogous to yak worship which is less abhorrent to me.