Sometimes I wonder if it's a respect or control issue. I once worked in a non-technical position that interfaced with a complex order management system. We were given zero access to documentation and had to rely on trial-and-error and the reverse-engineered model held in the head of one specific supervisor. I'm almost certain that certain errors that appeared over and over were caused by us temporarily clearing previous ones incorrectly. This was especially frustrating because we were 2nd shift, so dealing with those errors could mean the difference between getting home that night or getting home the next morning. It was hard to tell where along the line between, "They're not sophisticated enough to make use of them," and, "We don't want our processes leaking," we fell, according to the higher ups.