First night of the Proms. Music and anti-music

Guardian reviewer claims to have liked Mark-Anthony Turnage's three-minute Canon Fever, the tuneless and discordant cacophany that some Radio 3 executive used to spoil the first concert of the Prom season. Truly awful, worthy of Harrison Birtwhistle, and, thank goodness, short at 3 minutes. We switched the radio off and back on again for Elgar. I suspect most of the country did too. This kind of noise is to music as Damien Hirst is to art. Its purpose is to prevent audiences from enjoying the music too much, and it fully succeeds. No wonder that the Guardian did not open comments on this piece. What I don't understand is how and why people with obvious musical abilities write things like this when they could be writing music.