A genius architect/Formula 1 engineer can design a building/engine that fits all the requirements astonishingly perfectly, but if the builders have difficulties understanding it, or later contractors can't figure out how to maintain or fix anything, then it's only a perfect design in theory and an awful design in reality. It's not a nice-to-have to make people's lives a little easier, it defines the success of the project. The genius architect/engineer can insist that the complex design reflects the underlying domain as much as they want but at some point they will have to back that up to someone else who isn't a genius.
Obviously, writing code such that a first year comp sci student can understand what's happening and can start contributing immediately is absurd, but at the same time nobody builds anything in a vacuum. There's a certain legibility required within any context you're designing something for.
Obviously, writing code such that a first year comp sci student can understand what's happening and can start contributing immediately is absurd, but at the same time nobody builds anything in a vacuum. There's a certain legibility required within any context you're designing something for.