Some groups will speak highly of a genre while other will despise it. Cultural knowledge will be a more useful capital if it is associated with a more prominent group. Within the group, the extent of your knowledge will help you distinguish from others.
The point is that the way this taste (but also the artist's skill) is acquired is highly correlated with social belonging: your appreciation of a specific piece of work is informed by your past experience within your social environment. Even though you may produce an autonomous opinion on a specific piece of art, this opinion is formed using knowledge that is socially acquired.
To expand a bit with examples:
* if the genre you're into pays a lot attention to technical skill, you will probably need, and focus on distinguishing the technicality of the art piece. People unable to tell the difference will be seen as uneducated.
* if it focuses more on the relevance of the art piece in its time context, what others would consider a crude piece will be seen as a clever way to remind the spectator of the zeitgeist and how subtly references are made to other work. People who think too much about the technical details will be seen as unrefined.