Because this is the real world, and no matter what the internet tells you, nuance matters. I don't like Mark Zuckerberg. I think his business practices regularly register as complete bullshit, and furthermore I can't quite tell what the hell they spend their time doing because since about 2009 Facebook has consistently become more and more of something I don't want anything to do with.
But there is not one bit of me that doesn't believe Mark really does support free speech everywhere. He didn't have to say that, but he did. He made that effort, even though he knew it opened his flank. And of course he knew that, because he's not a complete idiot.
This is the real world. Where while complying with the law, you protest it, because that's how you act in a civilized society.