When I die, me and God are gonna be having some serious conversations about this seemingly restrictive design choice.

P.S. The fastest body in our solar system goes 200,000mph, or about 0.03% the speed of light. At this speed, it will take about 13,400 years to reach the next sun, assuming it ever arcs in that direction (if I got the math right - I ignored relativistic effects since it's so slow).

What if instead of trying to put people on there we put a small device designed for extreme accelerations. It would simply need to be in the path of the moving body. After that, it can hitch a ride and leave the surface when it's ready to wonder space at high speed.