Comment by embedding-shape

People, at least novice developers, tend to prefer fast and quick boilerplate that makes them look effective, over spending one hour sitting just thinking and designing, then implementing some simple abstraction. This is true today, and been true for as long as I've been in programming.

Besides, not all programming work can be abstracted into a library and reused across projects, not because it's technically infeasible, but because the client doesn't want to, cannot for legal reasons or the developer process at the client's organization simply doesn't support that workflow. Those are just the reasons from the top of my head, that I've encountered before, and I'm sure there is more reasons.