Same reason people are lying dead frozen on Mt Everest. Forever.
Why do they go there? Cause it's there. Cause they can see it.
Same with planets and everything else we can see. We gonna go as far as we possibly can.
Living in space would require a structure that has simulated gravity. A rotating asteroid hollowed out. The living space on the inside
Cause living in low gravity for long periods is very unhealthy. SOHH living on the moon or on Mars is not sustainable.