Sure, I agree. We shouldn't build giant cities in the desert either. Or let private equity buy up water rights and sell them to the highest bidder. Lawns and golf courses are ridiculous.

But look how water is allocated and who is using most of it in the west. Look at the insane things our systems of water law have incentivized. Look at the lawmakers who refuse to change the systems of incentives. Look at the ranchers and farmers (most of them) who refuse to do the most basic water efficiency changes because they've got the private property rights, and their traditions. It's the biggest piece, by far.