Indeed. The problem is not with the diagrams, so much, as with the requirement for people to draw them. The code is the source of truth and the only true representation of the program.

There is value in diagrams - but that value is highest when the diagrams are derived directly from code. That is why I am making https://appland.com/docs - get the benefit of interactive code diagrams, generated automatically from executing code (not just static analysis, which is too weak to handle the dynamic behavior of modern frameworks).