It's never black or white.
Of course it's a Good Thing (tm) when tech CEO use their influence (economic or otherwise) to advance social issues.
But what about when their agenda does not align with what's good for the public?
Is Apple's influence such a good thing when thinking about corporate tax laws, the 100+ billion they're hiding in tax heavens?
Is Google's influence a good thing when the FTC basically states "they're worse than Microsoft ever was, but meh, who cares"?
I don't particularity like the 100 richest people in the world making most of the decisions for the other 7 billion, even if they occasionally happen to align with the common good. And I doubt that anyone here believes that most of these guy's real agendas are good for the masses.