Because we can and it would be wrong to live forever in the cradle.
One day the sun will die. Our descendants had better be seeded throughout the galaxy by then.
I agree.. It is about the future..
I don't think there's the kind of generational interest to support the endeavors necessary for advanced space travel. We currently have the technology that we could set up a permanent base on the moon, but the question remains, why? EVERYTHING would have to be transported from earth for survival, and it would be a bleak existence. It makes as much sense to set up colonies under the ocean.