To say that such an observer does not exist is essential making the claim that "I" do not exist. Meaning, I would not be experiencing something because "I do not exist.
I am clearly experiencing something, and so are you. I can't possibly not exist...
There has to be some sort of conscious entity that is observing.
Although, "I" is only a label for what "I" think that I am. It's not exactly well defined concept. However, we should be able to agree that the idea of a separate observer is supposed to be an attempt to represent something experiencing reality.
I was making a point, not intending to claim that it was anyone's claim.
Or they are simply not very good arguments...
I actually tried to respond, I wasn't the one to start being nonsensical.