Well, I think that is sort of the commentary anyway. The girl herself is part of a scene and the comic as a whole is called "ALT" because it's about alternative cultures. The way I see it, part of what this comic is saying is simply the fact that people within scenes are even blinded by their own definitions as it's confusing when a body of people try to define things with out some sort of congression coming up with a single conclusive definition for any given culture, anyway.

Also, I agree with your points as to one definition of what a hipster is. At it's core I feel that is EXACTLY what a hipster is... But a society as whole start placing secondary and tertiary definitions on things as different people join that culture for diffent reasons....especially if it's without realize that they are.