I think this article ends up giving excellent examples for why you
shouldn't just "write simply". There is basically no argumentation happening here and most statements are just thrown out as truths. Yes, it might be quick and easy to read through, but it's not very good writing.
Examples:
> Plus it's more considerate to write simply. When you write in a fancy way to impress people, you're making them do extra work just so you can seem cool. It's like trailing a long train behind you that readers have to carry.
Notice how he's arguing against "write in a fancy way to impress people" and not "write in a fancy way". Most authors write in a "fancy" way to invoke a feeling in the reader. They don't add random words to "seem cool". Is spending a few more words to get the reader into a happy/sad mood "inconsiderate"? That's an interesting discussion, but in his quest to "write simply" he's just skipped right by it.
> It's too much to hope that writing could ever be pure ideas. You might not even want it to be. But for most writers, most of the time, that's the goal to aim for. The gap between most writing and pure ideas is not filled with poetry.
What is evening happening in this paragraph? First he's questioning whether it's possible for "writing to ever be pure ideas" without explaining what that's even supposed to mean. Then he says that most people aim for that. And somehow the solution is "not filled with poetry". I don't understand a thing of this. He's implying so much without explaining anything.