Asimov's robot series explains everything from the basics to the nuances rather well. All the criticisms I've seen in the context of LLMs are clearly not considering the body of work that Asimov produced on this topic.
In any case, it has so far been proved possible to make an LLM act against its directives, why should this be different?
And I don't think anyone is seriously working to make LLMs to adhere to these three Laws of Robotics.
I never really thought much about the laws of robotics- they seem more or less impossible to achieve in a wholly consistent by any reasonable objective-seeking robot.