[stkni]

This is a great question! When I was a developer I used to develop software the way you were told not to. I did it that way because the requirements were always very vague and a lot of gaps needed to be filled. But when I was a project manager I thought that way of development is wasteful and would rather developers didn't do what I did.

So I suppose the real answer depends on the environment you're in. If the project is meant to be agile then you probably need a bit of interaction with the user to get the job done. If the project is not agile and all the requirements could be known up-front then you're probably wasting effort having programmers determine what those requirements are. IMHO.