First of all, the First Amendment guarantees each of us the right to (using our own money) publicize our own perspective--it is elitism to suggest that anyone has the only true perspective (which is however the implication of the FCC's certifying that its broadcast licensees "operate in the public interest).
Secondly, when entertainment takes itself seriously it is intrinsically liberal. That is, I take it, because of its fixation on formulaic scripts with good guys, bad guys, and happy endings.
Thirdly, journalism is entertainment. The rules of what is and what is not "news" are designed to entertain. Thus the money that journalism gets (and uses to buy ink by the barrel, its source of influence) is no cleaner than the money you voluntarily donate to a candidate or party.