This is my favorite comment from the comment section of the Hurwitz video, IMHO far more interesting than the people angrily mashing away at their keyboard
I only wish someone would take the pains of writing something as nasty about me for my 90th birthday. Sibelius would have taken it as a great honour ... that's the Finnish spirit--take it from someone born in "Finlandia." No one insults you unless you've done something Great.
Because I agree with it on every level. As a resident there used to be an absolutely miserable senior cardiologist that we loved to hate. But it wasn't simply because he was a miserable man, that would have been plain uninteresting. It was because he was one of the most brilliant physicians most people had ever met.
Sometimes with these kind of scathing takes there might be something to be learned, Boulez criticized his fair share of music but you'd often at least learn something from his writing, more often about his own music. I can't say I've gained any further insight into Sibelius from this.