Sounds more like, don't do other people's work for free. There's nothing wrong with being good with a useful tool. I tend to become the go-to guy for some syst

Sounds more like, don't do other people's work for free. There's nothing wrong with being good with a useful tool. I tend to become the go-to guy for some system I hate, then I write scripts that people use instead of going to me, and at some point I become the guy who fixes that system for good. Then I apply that experience to fixing other systems, then eventually I start off a big new system in a way that avoids future problems that nobody else can foresee.