Dribbble, while large, is only one of a number of design communities. I don’t know if it was ever a place to display real work. It’s difficult to clearly capture and communicate anything in a 400x300 shot. It naturally evolved into the product you see today. I would love to see more real work, but it still is a very successful product which I recommend to anyone in the design field. Part of being a designer is always going to be having your work judged on pure aesthetics!