Comment by caymanjim

A variant of this that has driven me to quit more than one job is having a non-technical manager look at a UI prototype and consider that 90% of the solution. "The UI guys had this page ready two months ago! Why doesn't this work yet?" It's even worse when you present a working prototype. They simply don't understand that the backend functionality is what's doing the bulk of the work, and just because you can see something, that doesn't mean it's secure, performant, scalable, or even functional beyond demoing with dummy data.