Dance music is never given enough credence as a genre and art form. It was only just a few years ago that there was even a "Dance" category at the Grammy's. While bloated, older white male musicians were "sweeping" the Grammy's year after year, it was undoubtably because the awards were tailored to their style of music.
So it's been a problem for white, male, left-leaning rock critics. It's that whole macho way of defining good music. Guys who play guitars are musicians, but people who do dance music are frivolous throwaways. They love those hierarchies.