Amusing: his argument is that authorities say to use one, so use one. He then refutes arguments by others that they learned to use two spaces from their authorities, so they do. "That's wrong!" he says.
But he also gives the reasons why current authorities say one, and previous authorities say two - all due to the aesthetics and readability of spaces with proportional typesetting versus monospaced type.
The reasons are fairly subjective, but I don't see why so many here are dismissing them simply as pure arguments from authority.
There is no argument of value in this article.