I think you've got the wrong end of the stick. I think anything sounds homogeneous to someone who doesn't listen carefully, e.g., someone who doesn't care for the genre.
When Charlie Parker went out for chicken and waffles after a gig, he used to listen to country music on the juke box. This was Charlie Parker arguably the greatest god in the serious jazz fanatic's pantheon. When the other musicians would complain that country music was corny, Bird would simply say, "Listen."
The problem with the recording industry is that it is not in the business of producing music. It is in the business of producing and exploiting hits. I had this epiphany when struggling with the iTunes Store one day. "Why is the interface so bad? Why do they make me fight my way to what I want to buy?" Then it hit me: the iTunes Store was trying to steer me to what everyone else was buying. It's part of the hit industry.
It's no wonder that kids listen to music on YouTube these days. True, it's *free*, but to me there's an even bigger advantage. It finds me what I want, even if its a bit odd and even (gasp) non-commercial. The other day I was reading an old murder mystery got a hankering to listen to some old English music hall songs. That's practically a major project on iTunes but on YouTube you just pop "British Music Hall Songs" in the search box and Bob's your uncle.