Ten people can look at the same drawing and leave with ten different assumptions
A useful drawing does not remove disagreement; it gives disagreement a shared location, dimension and reference.
Clear hierarchy, coordinated symbols and traceable notes let each discipline test the same proposition before work reaches the site
The measure of clarity is not what the author remembers, but what another person can decide without guessing.
The design consequence is a clearer hierarchy of information, traceable references and documents that remain usable under real site pressure.
A good drawing helps people disagree early, precisely and on the same evidence.