Similar arguments can be made about almost any fashion item. People don't buy fashion due to it's great quality, and most of the time not even due to good design, but mostly just to show off.
[0] - according to sources like http://www.theatlantic.com/magazine/archive/1982/02/have-you...
Edit: Also wouldn't calling a fashion item ostentatious or low quality be a critique of bad fashion?
I laughed very hard for minutes when I found that!