The vast majority of the traditional media folks come from only one side.
Well, but that's where you palm the pea, now isn't it? You say "traditional media", where "traditional" means "everything that's not conservative", which allows you to claim that all "traditional media" is "liberal" or moderate, because you've simply defined it that way.
I mean, what's not "traditional" about Fox News or CNBC or Joe Scarbourough on MSNBC? What's not "traditional" about the Washington Post or the Wall Street Journal? What's not "traditional" about Ross Doubthat's column in the New York Times or Clarence Page's in the Chicago Tribune? What's not "traditional" about the National Review, founded by William F. Buckley Jr. more than 60 years ago? What's not "traditional" about former NPR contributor Juan Williams?
What's not "traditional" about the hundreds of prominent conservatives in the media? That they're not liberals? Doesn't that make your complaint completely circular? Wow, yeah, it turns out when you only interview liberals about their voting preferences, they tend to vote Democratic. I almost fell out of my seat!