Exactly. Dribbble is a canvas where you post whatever the fuck you want knowing that most likely you won't be able to use it anyway. It's a way to say, "look how cool it is", and move on.

It's not unlike posting a snippet of cool JS/CSS/whatever on HN and showcasing it. Yes it's not practical but it COULD be inspirational.

One reason why fashion shows exist is to give trickle inspiration to other fashion designers, not to be an exercise in practicality.