How to deal with graphic designers who thinks UX is boring

Working as a interaction designer together with graphic designers (or marketing people in general) I sometimes get the strong feeling that we sound too boring when we try to implement usability best practices.

Like: - Great. here he comes dragging his boring points about site speed killing my animated fullscreen background image idea or my very cool intro movie that would have won an award.

I feel that you could argue about the importance of smooth user flow etc, but it doesn't stick. It's not their motive behind being a graphic designer. This tension leads to poorer project results.

How do you tackle graphic designers who behave like this?