laws of culture.
When you group people together in gropus greater than eleven individuals the average intelligence of each person drops at a rate exponentially relative to the number of people in the group. therfore the larger the number of people together that think a particular type/style/artist/album/song is the shit, the more likely that it is simply shit itself. There is good music of almost every variety, the problem is with modern pop is that there are too many people praising it in too many ways. If you want to know what is good and stands the test of time as good music should. Ten years from now listen to a classic station, most of the good ones will get played.