Is the problem that you don't believe water should be a human right or that California is not one state, and should be split into two parts with individual rights to their own water?
The point of water being a human right is not the actual on-the-face claim (of course!) but that California is the only State in the Union to declare it so. This is purely politics at State-level, not a humanitarian objective (a la "national security" at the federal level). The exchange of this essential good should pay forward to the state-control and security for the North via deforestation is my point.
Think: Northern California already would be called Jefferson by now if Southern California pushed for it as well, but they refuse on the basis of Northern water, yet they give no due State power, that is the fundamental hypocrisy of Democracy.