This is not just about country music. Rock had the same problem in the 1980’s until SoundScan came along and forced the industry to reconsider what people really wanted to hear. It is the problem with the radio and popular music now. It is much easier to sign a few acts and use promotion to make some of them huge and cash in. It is easier to sell ads by creating stations with music or talk that appeals to a certain demographic.
But these actions are not good for society or our culture. They divide and keep us poorly informed. Commercial media is our biggest problem.