That's an interesting take on it. What you said about something good missing doesn't really resonate. Sure, there are some things missing in my life, but I don't' sense this is what the dream is about.
I think the dream is many "layered" like the cake. I do wish that I had inside knowledge and that type of knowledge where a person knows things hidden. It's late and I'm a bit tired so I can't think of it now. The dream is very metaphoric.
The first part not so much. I've been doing some reading and video watching about discrepancies in the official story about the terrorists attacks and I find it frustrating that there was a big cover-up about what happened leading up to them.
Now, about the woman and the cake. Let's try this:
Someone swipes away a surface covering to reveal a piece cut out or missing and what remains can hurt you if you take it in.
Damn, it could mean I'm a bitch!
I'll have to examine this more.