If I'm in the target market for high fashion, I'd probably list "clothes shopping" as one of my hobbies. I don't; I buy cheap clothes which retailers make minimal profit on. If I
was in the market for designer clothes then my tastes wouldn't be price elastic, so saving retailers' costs by substituting cheaply made model videos for the user experience of actually seeing and touching the clothes in a stylish location isn't much of a purchase incentive. By contrast, unless the local Blockbuster outfit offer exceptional advice, actually going and physically picking up DVDs is a mere inconvenience and I'd much rather pay less to skip it altogether.
I'm not arguing it's impossible to sell fashion items online; it evidently is. It's probably also possible to sell wallpaper over the telephone. That doesn't mean the economies of selling over the internet necessarily lend themselves well to disrupting a sector that enjoys massive profit margins through making far more effective emotional inducements to purchase than a photograph and a like button.