Why not just send robots, and forget about your magic rotating space ship? Robots don’t need to return. you might as well insist upon warp speed...the problem all science fiction writers encounter is the time for travel—the years in flight, with the bones and other vital organs deteriorating. Exercise helps—but only a little. Suspended animation, worm holes— even the new entrepreneurs like elin musk are stuck reinventing the wheel.
Because robots can only do what they are programmed to do and cannot think. The difference between a machine and a competent scientific observer is the difference between collecting bits of data and solving complex, scientific problems.
your magic rotating space ship?
Yeah, centrifugal force. Magic.
You're the one who brought up wormholes and warp drive. So who's fixated on science fiction as opposed to science fact?