A "user interface" is simply one type of dynamic picture. I spent a few years
hanging around various UI design groups at Apple, and I met brilliant designers,
and these brilliant designers could not make real things. They could only
suggest. They would draw mockups in Photoshop, maybe animate them in Keynote,
maybe add simple interactivity in Director or Quartz Composer. But the designers
could not produce anything that they could ship as-is. Instead, they were
dependent on engineers to translate their ideas into lines of text. Even at
Apple, a designer aristocracy like no other, there was always a subtle
undercurrent of helplessness, and the timidity and hesitation that come from not
being self-reliant.
It's fashionable to rationalize this helplessness with talk of "complementary
skillsets" and other such bullshit. But the truth is: An author can write a
book. A musician can compose a song, an animator can compose a short, a painter
can compose a painting. But most dynamic artists cannot realize their own
creations, and this breaks my heart.