The idea that how your audience receives the communication is their problem and not yours is entirely why some engineers are shit communicators and seem lost when facing the realities of human culture and politics. You might wish the world would all just think exactly like you but the moods, interest, and preferences of the people around you are YOUR PROBLEM and you need to engage with them if you want to accomplish…
The author argues brevity is more efficient even if it is rude so he argues for brevity. This is why engineers suck at politics and relationships. Brevity and efficiency is a false mantra to live by. It is better to be effective and get what you want without pissing off everyone. The authors’s example is a non starter. When he writes this approach is wrong…, he is starting a flame war even if he argues he isn’t. It would be better to say something like I disagree with this approach, then give your assumptions and reasoning. Even if you don’t get your way, you got it off your chest and came across as professional.