No they aren't.
Too many people think all writers are rich. Once, I decided to show kids how much I got per book bought and it was one dollar. And that's actually high; several of my books earn me pennies. And don't ask writers about their income from paperbacks.
I was talking to a lawyer about writing my will and he also assumed I was rich. Blew my mind that he didn't know that it's only a few writers who finally, often after many book out, earn a decent living.
Me? I kept my day job. Which gave me a pension in my retirement years.