One could reasonably argue that there's too much concentration of power in the media (a process that started decades ago with conglomerates building portfolios

One could reasonably argue that there's too much concentration of power in the media (a process that started decades ago with conglomerates building portfolios of media companies), but as has been frequently noted in the past, freedom of the press belongs to those who own the press. It's not a first-amendment issue, it's a market issue, and antitrust issue. Of course, political leadership spent many years deliberately weakening the power of antitrust authorities, so they reap what they sow now.