Brandon Smith has hit on a nice credo for code authoring, which he’s “stolen” from Michael Pollan’s advice on food: “Eat food. Not too much. Mostly plants.”
Code, like food, has value. I think those of us who write it can (hopefully) agree on that. Some, though, are so afraid of writing/eating too much that they avoid writing/eating what they should.
In the context of programming, I think this translates to an unhealthy fear (again, for some) of duplication. A little bit of duplication - writing something in a way that doesn’t completely maximize conciseness - isn’t the end of the world. Sometimes it’s the best path forward. Sometimes it’s okay to copy-and-modify here and there, especially when you’re still figuring out what your application will end up being.