This is lobbying effort directed at policy makers and the public.
As others have pointed out: There is an very simple solution to "solve" water waste/allocation: Just put a price on it.
BUT one big interest group, namely agriculture/farmers, absolutely don't want that, because they historically could pretty much use water for free (and/or underpaid massively)-- any rational discussion about water use/price/allocation is undesirable to them, because it is likely to make the situation worse for them comparatively.
This is also why the whole discussion centers round emotional arguments against allowing industrial water use at all, instead of arguing that small/local farmers should get a better price on it.