I recently talked with a colleague about documentation. We both studied math and were frustrated about the lack of documentation from our predecessors. I discussed with them very often the topic but both we resisted. One was claiming he writes "self documentated code" and the other one was smart but wrote none approachable code.

I guess the difference that (in Germany) math exercises cares more about reasoning and explaining while in CS / informatics solution is only the tested result. So yes, coder make the world more complicated ;)