>I do not see how ordinary people not wasting water at restaurants has any opportunity cost wrt agriculture water usage.
They are both legislated by the same group of incompetent politicians. These politicians are driven by re-election, so they will focus on things that look like helping more than things that actually help. Legislating day-to-day consumers will have much more visibility than major org water usage restrictions. People like you are the reason they get away with this. You support what they are doing because you think it helps, so they will not bother with the stuff that really helps because that's actually hard.
They are both legislated by the same group of incompetent politicians. These politicians are driven by re-election, so they will focus on things that look like helping more than things that actually help. Legislating day-to-day consumers will have much more visibility than major org water usage restrictions. People like you are the reason they get away with this. You support what they are doing because you think it helps, so they will not bother with the stuff that really helps because that's actually hard.