Yeah, but he's limited by his icon status. I mean, we all saw "Decisions." DC is terrified to let Clark take a stand on anything, terrified to ever have him enforce anything but established neutral authority (check out all those Bronze Age stories where he protects government interests against radical anti-nuclear-weapon types), terrified to alienate even a single reader by giving him even the slightest bit of political texture that someone might disagree with or that might force someone to think. And the thing is, despite his Golden Age heritage of being a radical and rabble-rouser, there's nothing inherent in his character now that would force his writers out of that comfort zone, and a lot (journalistic neutrality, his concern about exerting too much power over the world, etc etc) to help them settle right down into it.
They'd love to play it that safe with Diana too, I imagine. But an editor can look at a Superman writer who offers up a story about affirmative action and say "no, this is too political, you can't tell this story with Superman, you're going to insult and offend people." What editor can look at a Wonder Woman writer who offers up a story about institutionalized sexism and say "You can't tell this story with Wonder Woman" with a straight face?