> I think it's a bit naive to say that science doesn't turn on belief.
That depends entirely on what we mean when we say "science". If by "science" we mean as defined and as practiced when it's done right, then no, belief plays no part -- it can't. If it did, it wouldn't be science.
> Scientist aren't robots, mechanically and dispassionately ingesting evidence and spitting out theory.
Scientists aren't robots, but they are also not hothouse orchids.
> They're humans with imaginations, beliefs, agendas, and egos, guided (hopefully) by a methodology that leads to discovery.
You have left the topic of science. The reason science exists is precisely because people are the way you describe them. Science is meant to be a counterpoint to natural human instincts, beliefs, passions, and other logical failings.
> I think belief is what drives science, and it's not all that bad of a thing.
You're now confusing science with religion. In religion, you let sincere feelings guide you to a conclusion. In science, you let logic guide you to a conclusion.
In religion, something is true until evidence proves it false. In science, something is false until evidence proves it true -- exactly the opposite.
Much of scientific discipline is meant to guard against what we believe is true or want to be true. Experimental and control groups, the classic double-blinding precautions in human studies -- all are meant to minimize the corrosive, undermining influence of our beliefs.
The perfect religious follower is guided by belief, hoping only that his work reflects his passion. The perfect scientist doesn't care what conclusion his work comes to, hoping only that it reflects reality to the best of his ability.
Belief and science are in absolute opposition.