Thank you!
Design != Art !!!
If designer is more interested in fulfilling his artistic/creative ambitions than business value for client (making things great looking, stable and reasonably easy to implement -> in budget), he shouldn't even touch digital today. It's too complex and filled with too many constraints.
But if same designer wants to make decent money, well...
Similarly, any user experience study of a website isn't going to find that you should make your menu some diagonal shimmering nonsense, or try to convey information on the side of a spinning cube or any of that sort of thing.