It implies the two things have an inverse relationship. It's an old myth and non-sense let's face it. One example against this logic is Happy Mondays, LCD Soundsytem andprogressive music!
A style where many influences can melt together and influence each other. A genre where rock guitar riffs, vocals or electrifying attitude can melt with an accurate trance uplifting energy or a sensual house layer. If we join a minimalist approach or the glitchy sonic passion out there one understands that this is a land with of freedom to express music wise. One fact: it has become increasingly difficult over the last few years to imagine electronic music landscape without the crossover ideals. The Portuguese label Digital Oracle gets in touch with it in its latest release.