Citation required for such a handwavy assertion. Beats is a fashion brand and those are notoriously ephemeral. If Beats want to sell they may know the game is up, but then so would Apple.
Fashion brands M&A all the time> https://en.wikipedia.org/wiki/LVMH > LVMH is a classic, diversified example.
Even apple is seen by many as a 'fashion accessory'> https://en.wikipedia.org/wiki/IPod_advertising#Silhouette_St...
They ran an entire marketing campaign based on the gratuitious display of earphone cords !!