Leaving aside the literary purpose for the moment - when I go back and look at them now, some multiple decades after I first read them, I see a massive human-centric focus that I never did before. WHY is a human life more valuable than a robotic one? WHY is human "harm" so bad? WHY are human commands so powerful? I mean, for story purposes it all makes sense, but I'm fascinated that I never raised these questions mys…
Path dependence. If we build the robots from ground-up, from dumb pieces of metal through single-purpose tools to multipurpose bodies inhabited by semi-sentient AI, and given that this is the first time we're attempting something like this, it's only natural to apply precautions. There may be a time for the hypothetical human civilization, when it's so sure with its work that it decides to give those advanced robots…
I can reason it fairly easily - I'm disturbed that I never even considered the questions