https://xkcd.com/1205/ might be a good rule when working, but not when using a computer at home: automating the task might be more fun, I might learn more, while spending much more time than just doing the task. (I'm not sure this would convince me to learn the Emacs style of regular expressions; I always have to guess how many backslashes to add to turn a trivial POSIX ERE into an Emacs regexp.)