That's the key: they still trudge through it. I fully agree that those people are indeed amazing. In my experience, though, many complainers toss out every objection possible hoping to make the new project seem so difficult that it isn't worth doing (so everyone will just drop it). Those complainers are toxic and can kill progress. But yes, the ones who verbalize issues just to make sure everyone has a full understanding of a project and the challenges in completing it... but still have every intention to conquer those challenges and stick with it to the end... yes, give me those types of 'complainers' ANY day :)
From my point of view, we get a new project that I think will take 6 weeks because of X, Y Z. Management thinks it should take 2 days, so they say go ahead anyway. The project takes 8 weeks to finish most of the features and doing this effort forced us to drop every other thing we were already maintaining and working on. Everything is late, the targets set for the year miss as we spent 2 months on this other project and nobody is happy.
As an "old warhorse," I can tell you that I have been labeled a "complainer," because of such "complaints" as "Have you considered what happens when the user does X?" or "I tried pretty much the same thing, last year. It didn't turn out the way I wanted. Here's what happened..." or "Is that thread-safe?" or "Are you sure that will never be called on another thread? You do have a few network closures, here." or "Did you make sure that you let the connection go, after sending that instruction? It will result in power drain, if not."
Those types of complainers are certainly better than the types who don't actually do the tasks. But even better are those who do the tasks without burdening their coworkers with complaints.
