That's a largely theoretical advantage for radio.

What happens far more often is that the big labels that are paying (directly or indirectly) get to decide what gets played. And listeners are forced to choose between a handful of intentionally-overlapping stations, each of which is pushing, primarily, an unfortunately small number of "hits".

While bittorrent itself is not a medium that lends itself to discovery, it does at least serve any non-trivial subset of taste and isn't as easily gamed as radio play and shelf space.