The point is that regardless of the cause (maybe the sun is becoming a red giant ?) if the oceans rise and new deserts form, it is not going to be acceptable doing nothing. One day that may mean packing up a lifeboat and looking for a new planet, but there may be more dying ahead for a large part of the population than what has been seen since the dawn of "civilization". If you can accept having your quality of life (or childrens) drastically altered, that may be OK, but everyone expects someone else to suffer in this land of "me first".
It will not take much more drying before much of the west coast will have to get their water from desalination. We will be building nuclear reactors for desalination before electricity. There are already wells drying up west of the rockies, yet Las Vegas expects to keep living in ya ya land, if that means buying out everyone between las Vegas and the Rockies and pumping out all the groundwater so they can keep "living it up".
Its just like the economic and real estate "bubbles", the problems come from living beyond our means. When the climate, that is the basis of all life is threatened, we can't expect to get away with living beyond our means either, someone will have to pay. Possibly just future generations. All that is asked is to try to conserve resources, nothing more, nothing less.