All good points you have made.
I think her comments were a feeble attempt to suck up to Hollywood (who is basically anti-Christian with a few exceptions), and move up to the “C list.”
Not having ever watched her or heard her, I called her a "young lady." Marlowe pointed out to me that she's not very young.
That probably doesn't change my assessment of her "atheism" much. Age would make her more cynical, and maybe a bit more determined.
I would probably conclude that she's struggling with spiritual identity after all these years....but not too often.