If you're operating under the idea that we can't expand the supply of water, then you basically believe California is full. It would then follow that you would be against immigration, since more people would only exacerbate the problem.

That makes no sense and derails the discussion (which is about mining of minerals -- not immigration), considering over 90% of the water is used by industrial agriculture -- not individuals. The fact that individuals are being asked to conserve water at all is a sham.