I heard lots of creative stories about The Man (in context, the "Commercial Pop Recording Music Industry") when I was at Berklee. But the fact is, nobody there has a clue about stuff like this. Students live in a Berklee bubble, occupied full time with class load focused on stuff that almost nobody in the actual industry is involved in other than music students elsewhere. Likewise, Boston hasn't been a music industry town since the 1970s and Aerosmith, Boston, The Cars and J. Geils so how would he even know?
The Commercial Pop Recording Music Industry exploits trends for itself and for those who follow it. It's like organized religion or any other cult, including those who glue themselves to the political media. It's an echo chamber. That's been true of commercial music since the 1940s. Only occasionally, maybe once every ten years or so, does a unique artist or sound emerge from the grassroots which is so powerful that he/she/they/it breaks through the monotonous status quo noise and the industry embraces it so it can exploit it. Then it produces ten more years of cookie cutter music just like it, like a music genome suggestion.
That's my theory anyway and it extends back to Sinatra/crooners, Elvis/Buddy Holly/early pop R&R, the Beatles, disco/Donna Summer, power pop, new wave, grunge/Nirvana, hip hop, etc. NB: my theory is no more authoritative, accurate or correct than your Berklee friend's. But at least I know I don't know. But one thing I do know from decades in the NYC music scene: the CPRMI creates nothing, only duplicates, and it only controls those willing to be controlled. The notion that it's a monopolistic Deep State in a Dr Evil back room creating music trends is pretty silly.
I frankly haven't listened to pop music or radio since the 80s. For me, all the CPRMI does is create different flavors of potato chips for a market of people who like potato chips. Someone else invented the potato chip. If the CPRMI manages to discover a truly great artist I haven't already found on my own it will filter into my world sooner or later. Some have but in the meantime, 95% of the more modern stuff I listen to only has a presence on Youtube and streaming music channels, like fado artists, Jacob Collier, Knower and GOASTT. Otherwise, the closest I get to CPRMI music is some idiot stopped next to me at a traffic light with a boombox car.