I don't know if I'd call it "sad" per se, but I would agree entirely with the rest of your analysis of her.
She is the the most ironically dogmatic person that ever existed. (Mind you I said "ironically dogmatic" not dogmatic, but she's still up there nonetheless)
Metaphysical materialism is the concept that material objects and phenomena enjoy existence independent of perception and comprise the entirety of reality.
Here is the central issue I believe. I don't understand how one can assert that something doesn't necessarily exist independent of perception. Is this not a very eloquent way of agreeing with Descartes and saying "I think therefore I am, but I can't prove anything else". You're just playing into the camp of ultimate uncertainty and subjectivity.