Just as I thought, you can't think of a reason. Man made islands are nothing new. The only joke is your limited knowledge. You should get out more, Jedi.
Yes, because the ability to build an island that small automatically means you could build your own Taiwan, Cuba, or even Greenland. It would obviously be practical, cost-effective, and take limited time. That's why after all we have dozens of islands with populations of millions that are all man-made all over the place.[admin edit: personal attacks = off]
Next you'll say that since we built a space shuttle, we could easily make an aircraft carrier into a deep-space transport and fly to Jupiter. Or since we've figured out how to broadcast an electron from one location to another, we'll have Star Trek-style transporters tomorrow. Just because you have to know how to stand before you can run doesn't mean that the ability to stand equals winning a marathon. [admin edit: personal attacks = off]
The Jedi Master