It's not meant to be an all-encompassing statement on talent, it's a statement based on what becomes most popular on social media.
I'm pretty sure most will agree that what becomes most popular on social media, TV, and radio in this era, is far from what most people truly see as top talent.
Our favorite musicians and bands now more than ever rarely make it to public consciousness, often making it to public consciousness involves massive levels of funding, while even the most popular artists usually end up in terribly exploitive contracts (like TLC for example). Most of the modern musicians we know and love have no health insurance and, more often than not, aren't anywhere near wealthy from their work.
Taylor Swift & Beyoncé are also artists that rose to prominence prior to this new era of Social Media influence (as a footnote).