The primary goal of writing is communication. If you are trying to convey information, you need someone to actually sit down and read it. Most of the time, this isn’t a problem, you’re writing for someone you have a pre-existing relationship with and they want to read what you have to say, whether that be a friend, a coworker, or your future self.

Problems arise when you move from one:one, to one:many communication. If you are trying to pass knowledge on to people you have no prior relationship with, you do need to attract their attention in a sea of options. If you actually have something important to say that other people need to hear, it does nobody any good for you to go unnoticed. In those circumstances, I don’t see anything wrong with taking Gwern’s advice.