It's not just about solving the end user's problem, it's about anticipating future problems and features. If all code was write-and-forget you'd be right, but i

It's not just about solving the end user's problem, it's about anticipating future problems and features. If all code was write-and-forget you'd be right, but in general you have to maintain and upgrade codebases over a rather long timespan. That's where "implementation details" matter a whole lot.