Wouldn't it be easier on the reader to simply include the Notes in the body part of the essay? Especially when the notes are short. For example the aforementioned note no. 4 goes:
"[4]Corollary: If you're not intellectually honest, your writing won't just be biased, but also boring, because you'll miss all the ideas you'd have discovered if you pushed for the truth."
Which is short, relevant, and insightful. What's the criteria for which piece of text goes into the body of the essay, and which goes to Notes? I guess if a substantial percentage of readers skip the Notes part, then it's a time-saving practice to separate the two.