[masterso]

It's everything to do with destiny, [space is big and there really ain't anywhere else to go] along with many other reasons such as an astronomical catastrophe, adventure, the pursuit of knowledge, and to go where no bastard has gone before etc etc

destiny (noun)
- The events that will necessarily happen to a particular person or thing in the future.
- The hidden power believed to control what will happen in the future; fate

Even though it may end up that way, we are certainly not 'destined' to travel the stars