I was wrong to think of UI developers as lightweights. A good UI developer is anything but a lightweight.

There. I've said it.

Arrogance, thy name is Pete

10 years ago I felt I had to make a choice. I could either specialize in the back end stuff, architecture, databases, such as that. Or I could do UI. 

DId I make the right decision career wise? Maybe. I chose the back end, and it's been a really nice ride. I'm a systems guy, and there's enough there to keep me always learning, the money hasn't been bad, all is well. Read more »

Great quote from Neal Ford on user interface design:

"Good user interfaces are like pornography: I know it when I see it, I can't do it myself, and you don't want to see me try."
 

I have been correctly accused of quoting Neal Ford too much. Yet this is an idea that could spread far and wide, and would do no harm.

Engineer != designer. It's a completely different use of the brain.