NASA chief suggests SpaceX may be booted from moon mission

For a serious answer: it's a lot cheaper to launch rockets from there, and we're running out of stuff to do in the region immediately surrounding Earth.

Is it? You have a build a whole fuel refinery on the Moon before it's worth even thinking about.

And even then, you have to get whatever you want to launch to the moon in the first place...

Building the fuel refinery is a high upfront cost which will quickly disappear. The delta-V required to exit Earth's surface is nearly an order of magnitude higher than what's required to exit the Moon's surface, and the moon is full of fuel.