Actually, no, I disagree, it is not the duty of a short-term technology industry leader to be an instrument of social change. They can do that if they want to,

Actually, no, I disagree, it is not the duty of a short-term technology industry leader to be an instrument of social change. They can do that if they want to, but there's no categorical imperative. One might even cite Facebook as the counterexample, an organisation whose leader is explicitly and openly part of a systemic shift in expectations of privacy.