No
It is not rationing access to prevent monopolies. The historic justification for monopoly restriction is the exact opposite. Monopolies can control supply while competitive markets are forced to supply what the public wants. If media outlets are not controlled by a single source they are free to make use of niche markets and be profitable while others fight over the largest portion of public preference. You will always get the majority served the most, but you will also get the minority served.
Regards,
Mark