I think it's also because you don't have the context of the full project. For example, a project I worked on had a lot of tacked on functions because every coup

I think it's also because you don't have the context of the full project. For example, a project I worked on had a lot of tacked on functions because every couple of years, we'd get pulled in on a contract to update the software. So you'd go in, complain about the software, realize why someone did it the way they did, and then add another chunk to it. You didn't like how it was, but you understood why it was the way it was.