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The reason prosthetics are so good in Star Wars is because the Jedi use live lightsabers to train.
(self.showerthoughts)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
We have walked on other celestial bodies, but we still burn toxic goop that destroys our atmosphere in order to buy chicken nuggets. Logic need not apply.
"The future has already arrived. It's just not evenly distributed yet."
I accept your premise that parameters of technological advancement need not influence each other, but assuming that they correlate similarly as on Earth, prosthetics and interstellar travel might have moved forward by the same coefficient.
In that case, walking on the Moon is like using a rock for a prosthetic eye.