Just my 2cents here but these last few posts seem to be getting closer to the bone.
I think that for Bukowski classical music represented order, complexity, discipline and beauty in a way that jazz did not. He seemed to draw strength from the fact that the old composers (esp the Germans) lived lives of great suffering and yet created music of great beauty. I think that helped him get thru, in his life and in his writing. [Personal note: when I was drinking and awoke really sick, with the End of the World Club meeting in my head, there was nothing better than turning on the clasical radio station...if only to convince myself that life still held order and meaning outside of my own personal chaos. Really got me back on my feet more than once.]
These composers were, in a sense, of mythical proportions given to them by history as well as their achievements. Buk could go to the free library and read about them and their trials while trying to take his mind off hunger and being deadass broke. The real hardcore jazz guys--Diz, Bird, Miles, Trane--these guys were all in the trenches too. They were all getting drunk and dopesick and getting busted and having their cabarét cards yanked. So, while I'm sure Buk could appreciate that, they weren't really able to give him a lift the classical composers did.
Then there's the fact that jazz was the hip cool beat thing, which some of you guys already mentioned. The clubs, the fashion, everyone trying to look cool. That was the anti-Buk. And if I'm not mistaken, there were free concerts by the LA Phil back then, and he could sit out on the lawn for free and soak in the music.
Just some thoughts... you can take em or leave em.
-Charlie