No, the argument hinges on two factors. Is man responsible for global warming AND is it harmful? We must have HARM before remedy, right?
While I can imagine there could be some good things about the earth warming, the fact that so much human development is on the edge of the ocean would trump that I'd think. Not only is a lot of the development on the ocean but much of that land is pretty flat so that if the ocean levels rise not only the developed land on the ocean gets flooded but also a lot of land inland.
Not only would a lot of previously useful land simply be lost but it would be the land that contained a whole lot of expensive development.
Maybe we could buy some land far inland with the hope that it'll be oceanfront property someday, like that villain in the Superman movie did when he got land inland in California then tried to make it oceanfront property by creating an earthquake and having a big chunk of California break off.