I was wondering why they would bother with a scene like that. Why introduce a rotten pea in the can if it were just a normal dream. But it's not a normal dream. All things that look externally well, are tainted from within.

When people dream of a can of peas, they would all usually be fresh. Well, the rest of the peas is a facade for that one rotten thing that Scarlett has done.

source: Bottom Of The World Explanation

You can see the same thing in the bathroom of that otherwise clean hotel. A muddy taint. Her psyche is scarred.

I'm sure there are such flaws all over the movie?