https://en.wikipedia.org/wiki/Pierre_Bourdieu#Theory_of_capi...
PG may say that his father pushed him in a different direction. But I suspect - like me - PG grew up with the cultural direction of the BBC and its mission to "inform, educate, and entertain."
So if you were a bright curious kid your parents wouldn't necessarily be the ultimate authorities on culture and taste. There were other authorities. If you were interested.
I was genuinely shocked a few years ago when I realised how much my cultural interests had been shaped by that kind of social programming. I still enjoy art and music, but I'm little more circumspect about them now.
The point: cultural taste is an aspirational social marker. It correlates loosely with some observable features in various kinds of art. But the real goal of "having taste" is to convince yourself and others you're a certain class of person, and also to reassure yourself and others you're not a certain other class of person.