It's funny how reactionaries have gone from "it's not really happening", "it's not man made" to "it's too late anyways" in no time. The same goal remains; to keep doing nothing.
Moving to higher ground only considers the first-order effects of climate change - floods and severe weather. Potential further effects include reduced agricultural output/efficiency, massive migrations of climate refugees, and the destabilization or collapse of national governments. If we do nothing, natural disasters will be the least of our concerns.
Beyond the point of no return now. Time to start moving to higher ground.