Radio is dead...and we know who killed it. Lou Dickey and Bob Pitman to name two!
Someone has to provide the money so that consumers can listen to free radio. Those people are owners and advertisers.
If not for companies like Cumulus and CC, there would be other companies with the exact same motivation doing basically the exact same thing. That's how the system works. These companies are keeping radio alive. You don't see Jeff Bezos or Apple buying radio stations. It's just not happening. The other options are churches or people with political motives.