Programmers (can I call myself one?) have a tendency to be lazy. And laziness can result in a tool that may save a few seconds here and there, but by golly, those seconds matter!
I work on a lot of client sites, and the themes are rather inconsistent with adding “edit” links for posts or pages. Add in the fact that some of the sites have disabled the toolbar, I got rather frustrated disabling the code and/or manually searching for the item in the WordPress admin area.