Real music? Classical music isn't "real"?
Rock music and "classical" music are equally valid forms of musical expression. What matters is who is creating the music. No type of music is going to be 100% good.
If you are "distusted" by rock musicians, I advise you to consider that many classical composers were of about the same background as the type of rock musician you reference, e.g. many of them took drugs and drank, and on top of that, many rock musicians have college degrees. Four of the five members of Radiohead, for instance.
I really detest such broad generalizations such as the ones made by cantthinkofaname.