I think the problem goes beyond ownership though I'll touch upon that first. I recently read how Dan Snyder has basically co-opted the entire DC media establishment on behalf of his team. If he couldn't buy a media outlet or forum, he sponsored it. If he couldn't hire a journalist or talking head, he sponsored their radio or TV show. He spent money over the years to stack the deck around his team; negative local press is rare. Those who do speak out suddenly find they and their company's press credentials reduced by 80%.
The media also plays to ratings, so content takes a back seat to selling advertising. Remember Dan Snyder from the above? If you can't buy a media outlet then buy ad space. Problem solved. Still have a problem? Limit access. All of that is on top of the personal bias of the journalists, editors, producers, and owners involved.
You'd think social media could bridge the gap or offset the above, but it fails because of a common weakness: mankind. We're emotional but we lack emotional stamina. Regardless of the cause it burns bright, hot, and fast. Nixon would absolutely walk if it happened today because people are fickle and lack the discipline, energy, and passion to see something through.
Between money, personal beliefs, and personal weakness information doesn't stand a chance and causes are a flash in the pan.