There was a period in Bay Area about a year ago, before some of the more strict regs were enacted, when the local papers were running front page stories almost daily about water shortage and the city's refusal to implement "common sense policies" and other such nonsense. No one said a peep about that bag of almonds which wasted as much water as your entire house would use that month, lawn watering included.
I see it as a means of subjecting the population toward ever increasing levels of scrutiny, control, and government interference. The drought is just an excuse. The policy has zero meaningful impact except to expand government largess and the populace's willingness to kowtow to authority.