In fact it's demonstrably wrong. Take any aspect of musical talent, from innovativeness to musicianship, and measure any top 100 chart musician against it. They'll do worse than a typical Berklee or Juliard Grad. Measure technical ability / virtuosity, and essentially no mainstream pop artist will rival the guitarist in one of a hundred thousand unknown speedmetal bands.
You're working from the fallacy known as the 'just world' hypothesis rather than reality.
We may be at point in post WW2 history where the lines of talent / ability and fame are most divergent in the music space. There absolutely are fantastic musicians with large audiences, but extremely few at the top of the industry. Meanwhile the production line of safe, marketable, utterly conventional pap - from Taylor Swift to K-Pop is operating at maximal efficiency.
I don't have a solution to this problem (outside the wholesale destruction of consumer capitalism), but to pretend its not there is ludicrous.