Earlier quoted context omitted.
Arizona has the reputation of being a desert, but in reality it is a state that is half-desert and half-mountain, and has a tons of water. Enough to waste on ubiquitous golf courses and alfalfa farms. There is a canal system taking the water from the mountains to the drier south where people live. But the population pressures are realigning who pays what for the water now, so I expect the alfalfa farms are going to g…
The thing you don't mention is that Arizona is wasting other people's water -- nearly 40% is sourced from rivers originating in other mountainous states https://www.arizonawaterfacts.com/water-your-facts
I don't mention it because it's not true. The idea that if a river originates in one state, then that state owns all the water from the river is not how ownership of river water works. And in America, rivers often form the border of states, so there are always competing claims about which state gets which percentage of the river. These are generally settled through treaties and agreements among states, and those agreements were made also for the Colorado river. Arizona is only taking its share of the water as per the treaty, not someone else's share.