There always seems to be a disconnect between tech philosophers and the technology they write about. Maybe they should try to actually work on 'AI' before preaching about it.
To confirm your point a simple example is when working on an automated classifier for loan applications. One way to make the system more ethical, that is less descriminating based on certain features like race or gender, is to often lower the threshold of acceptance for the marginalized classes and raise it for the other ones. Anyone who had to do that sees how it poses a dilemma of equality vs fairness or even fairness vs cost. So indeed, ethics cannot be solved.
To confirm your point a simple example is when working on an automated classifier for loan applications. One way to make the system more ethical, that is less descriminating based on certain features like race or gender, is to often lower the threshold of acceptance for the marginalized classes and raise it for the other ones. Anyone who had to do that sees how it poses a dilemma of equality vs fairness or even fairness vs cost. So indeed, ethics cannot be solved.