Not a real wife.
Not a real miscarriage.
Not real sadness.
By most accounts, not a real artist either.

He did it because he's emotionally damaged as a human being, which was particularly evident in his followup to all criticism of loss itself. The reason why loss is a meme is because B^uckley was an uncompromising asshole about everything that followed loss, never once in 10 years admitting in any media that it was inappropriate or that people who were upset.