“I don’t know much about Art, but I know what I like”
This phrase juxtaposes two kinds of knowledge: knowledge about something and knowledge of something. I may know of your best friend but this doesn’t mean that I know about them. If I knew about them I might like them, but I can’t really like anything much (apart perhaps from the most primitive pleasures) without further knowledge.
The implication of the phrase is that knowing is somehow opposed to liking or that liking precedes and is superior to knowing. This isn’t just anti-intellectualism but a privileging of sensory pleasures over cognitive ones. There’s knowing and knowing. The more we know, the more refined our understanding and the greater the scope for pleasure.