Music is music , wether it's a concerto or some guy banging on a lid and singing off key , if someone gets pleasure from it then it's good.
People judge on thier own tastes and thier own assumed superiority , music can be so many things and the criteria for measuring it must be just as diverse.
I like a lot of ridiculous little ditties that as far as the purists are concerned are shit songs , they fail to understand that the songs weren't written to show off intellectually but simply to entertain , in this they more than succeed.

Assuming that your own taste in music is somehow superior to anothers is simply a sign of arrogance.