Human engineering can be put into words. It's just very scary. Genetic modification, cyborgification or mind uploading could give us any bodies we want, but als

Human engineering can be put into words. It's just very scary. Genetic modification, cyborgification or mind uploading could give us any bodies we want, but also create new terrifying possibilities of control: imagine you've been genetically modified by a tyrant, or your brain lives in a robot body built by a tyrant, or your uploaded mind is in a computer controlled by a tyrant. Humanity isn't politically ready for human engineering tech - in other words, I wouldn't trust any of today's governments with it - but it's coming one way or another, and probably sooner than starships.