While he is correct, he's also a bit off topic.
Not to be too critical of his critique of critcism, but the OP was referring to professional music critics, not people simply expressing their opinions about things.
I believe the term is "sheeple". Sheep + people = sheeple.
And in the words of Marcel Duchamp, "Not everyone is an artist, but everyone is a fu#*ing critic".
The most prominent benefit of professional criticism is that it can spur us to process a work of art in a way we may otherwise have overlooked. At the same time, I'm highly selective in the critical perspectives I take seriously. Propaganda is abundant. The ability to distinguish between substance and blather is paramount.