Agreed, except that companies such as Google, Facebook, and Amazon are orders of magnitude more powerful than traditional media companies. Keep in mind that Google and Facebook are the gateway to the internet for the vast majority of users. If Facebook erases news, a vast majority of people may never know it happened.
If Google orders search results that highlight whatever it likes on the first page, and buries what it does not on the 10th page, people's understanding of the issues will be severely skewed. We are talking about companies that have the power to manipulate ideas and information orders of magnitude greater than anything in human history.