Asimov’s favorite overarching theme is that whenever you try to constraint robot/AI ethics with rules, creative misinterpretations or misunderstandings tend to have outsized impact.
It exists so there's a way to respond to demands like 'no criticizing Israel', or 'Taiwan is an inalienable part of China's territory', or double negatives like 'no not agreeing to automated droning'.
Because if you do not have a way to agree with these, your business can and wil be targeted and shut down.
I think what OP meant is Asimov's stories revolve around issues arising from loopholes or some interpretation of the three laws of robotics.