An "entertainer" recently suggested that the goal of entertainment is to "create a common culture." Whille this may not be true in an ideological sense, it is certainly true from a return on investment sense. 500,000,000 plays? It doesn’t require anything above 4th grade math to determine that there’s a fairly substantial paycheck there for somebody(s).
Today’s new well-written music/lyrics hasn’t experienced the profound transition from, say, Bing Crosby -- > Led Zeppelin. It has nuance which has not (yet) wrapped it’s arms around massive quantities of music lovers. You have to find it vs it finding you.