This is more analogous to a company having an internal "not doing crime" division. I do mention in my original post that having specialist skills within legal or compliance to handle the specific legal and ethical issues may make sense but having one team be the "AI police" and everyone else just trying to build AI without having responsibility baked into their processes is likely to just set up a constant tension like companies often have with a "data privacy" team who fight a constant battle to get people to build privacy practises into their systems and workflows.