A Wikipedia article about Didion mentions a 1980 essay by Barbara Grizutti Harrison, who wrote that Didion is a “neurasthenic Cher” whose subject is always herself. Apparently, that article rankled Didion for decades. Of course, the essayist’s subject is always herself.
Almost none of us writing essays will achieve Didion's fame, but we can all do what she did, which she explained in her essay "Why I Write": "I write entirely to find out what I'm thinking, what I'm looking at, what I see and what it means."
(In Didion's honor, a western landscape.)