While your comment is true on its face, unfortunately it has led to a culture where inhouse applications suffer from horrendous usability problems. As a result, two things happen: you end up with a limited number of people who can actually use those tools (creating bottlenecks), and those people are not very efficient because the poorly designed nature of the tools means spending way too much time getting them to work properly.
edit: I think as an industry of professionals we need to get away from "it just needs to work, it doesn't need to look pretty." Even when I develop tools for personal use, I try to make them as usable as possible. It's easier to take pride in something that not just works well, but also looks good.