This is pretty autistic. I kind of agree, being somewhat on the spectrum myself. But I think the world would be a considerably worse place if everyone abided by such rules.

Some people have an attitude to work resembling “I spend most of my day here, so having enjoyable professional relationships with my coworkers is a major determinant of my quality of life.” And there are other people who have an attitude closer to “it’s my goal to deliver value efficiently and get paid. I’m not here to make friends. Any meaningful human interactions happen outside of work.”

I don’t know enough about autism to know if that’s the right label for the second category. (I’ve had coworkers who identified as autistic who seemed to deeply care about whether I enjoyed working with them.) I think these two types of people can work together productively, but I don’t think they’ll ever totally understand each other.

Reading the article, I also feel that all of his examples are poor communication, both the "courteous" and the "direct" ones. You can communicate clearly and succinctly and also be considerate of the person you're talking to.

That's the point; you're supposed to agree on this level of directness beforehand, expressly and explicitly.

The problem is that too many people couch pettiness and personal attacks in the philosophy of "being direct" or "telling it like it is". OP specifically mentions that criticism must be made on technical merits. The people that hand-wave this distinction away are absolutely insufferable.

>considerably worse place if everyone abided by such rules

Those rules are not meant for everyone.