You seem to be assuming that what you want to hear is how people should be learning to communicate ("I'd prefer they skip it"), but part of the point is that we are not like most people. If you want to communicate effectively with the broader population, then you have to focus on what they like to hear, not judge communication suggestions based on whether you would like hearing it.

Also, I love brevity, but I charitably assumed that the politeness examples were exaggerated to make the point. Exaggerated examples, while they often bother analytical types who already get the point ("but that's too far the other way!") are (IMHO) quite useful at helping get across new ideas by magnifying them.

And compactness is hard, as is habit change. So developing compact politeness seems harder than developing politeness and then polishing it with brevity and clarity. Maybe too hard for some people - one habit at a time is often easier.