There are people who don't care to simplify the code even after the fact. I worked on a project where half or so of the code was copy-pasted from somewhere els

There are people who don't care to simplify the code even after the fact. I worked on a project where half or so of the code was copy-pasted from somewhere else in the same codebase. The original author claimed that this way is better as it allowed him to see what the code does without jumping around the whole codebase.