I'd argue folks in ethics roles shouldn't be responsible for actually creating the systems, processes, and practices required to put those concepts into practice. That's what engineering, product, and people leadership are for.

AI ethics is first and foremost about setting policy and advising on how those systems should be constructed.

This is because ethics isn't some separable function. It threads through everything an organization does. You can't just treat it as another department/function/unit if you want any hope of actually making it work.