Sure, but people don't try this in rich countries either. Places like Texas or Florida would be a lot nicer in the summer if they were 10 degrees cooler.

I'm not sure about the specifics, but there must be some way to get that cold out of the ocean depths and up to where people can benefit from it. People have been transporting large volumes of water since Roman times, and we have huge multibillion dollar oil rigs that drill through the ocean floor.