Well, like you know how to tell your problem to computers, those experts know how to tell your problem to human beings. And higher you are in your career, more you have to speak non-tech people that pays your salary and needs to be convinced about your next idea.
That assumes one's goal is to go into soul sucking middle management at a large tech company. For many of us, that is not our goal.
Yes but effective communication is NOT about visuals or font choice. An idea presented clearly and concisely is key.