I think the title doesn't really give a good impression of the contents of the article.

The article spends most time on evolution Sacks' homosexual identity and struggle with sexuality and repression.

His uncertainty and melancholical bouts maar him question his own work and make the author conclude him 'putting himself in his work'.

However very little evidence is presented. Most insinuated about is 'awakenings' yet even in that case it's hard to reach conclusions.

The author plays of his perennial self-doubt as aan admission, but there's very scant evidence about him actually making up stories.

I'm not saying his method is our isn't flawed, it's just that the title belies the story. The struggle with his sexuality is the main subject and only small bits are about his uncertainty of his work.