does not mean that they will present a fair and balanced spread of ideas

Not fair, and not balanced, just full spread.

The "capitalist class" interest is to earn money, which necessarily makes it fill ALL possible revenue niches: from state sponsored propaganda, through different interest group propaganda, all the way to anti-system, extremist, and a large variety of scams. If nobody else is doing it, someone will, no exceptions.

Assembling a "fair and balanced" set of sources, is left as a task for each voter; that's where each one's ability to contrast sources comes into play.