The same general formats and pretty much the same songs within each of them will be found everywhere in the US because, since the advent of network radio in the late 1920's and the addition of network TV in the post WW II years.
What works in Seattle works in Tampa and works in Albany... Georgia or New York.
Almost every station is owned by a corporation, even the little local Class A FM in rural North Dakota.
And the same general formats with pretty much the same songs will be played by any station that actually consults with its listeners about songs and formats.
Before consolidation, half of all US radio stations showed no profit. It had been that way since the 50's, in fact, but was getting worse because the FCC allowed thousands of new stations, while available advertising money did not increase.
And, by your definition, I suppose all private companies that seek to make a profit are "greedy". If you want no radio stations that consult with listeners for their programming and no profit-seeking enterprises, move to Cuba... please!