He says it whenever one of his earthly cohorts asks him to use his “angel powers” to do something. It frustrates his friends to no end. Their impression seems to be that he simply does not want to do the things they ask. They think he’s just being a pain in the neck.
If you spend your resources providing many different services and products, or providing them in many ways to a wide variety of customers, you risk diluting your quality. The more you do, the less you can do well.