We like some bands because we think we have to.
There are a lot of bands in the indie canon. Some of them, like, say, Pavement, are not bands we like or will ever listen to of our own volition. However, that's not an opinion to share lightly. Certain acts were around at the beginning of the the indie scene and have since taken on an infallible aura—if you like indie music you need to know their catalog well and agree that it's good. The problem is, not everyone is going to like it, and something that's "indie" now is rarely going to be stylistically related to these indie progenitors. So, you might hate Pavement's music, but if you want to be taken seriously as a discerning fan, that is one opinion you should keep to yourself.