I think you're wrong about them being "special snowflake" arguments, and likely miss the point of them. Those arguments are very low-level in the intellectual

I think you're wrong about them being "special snowflake" arguments, and likely miss the point of them. Those arguments are very low-level in the intellectual stack, and can only address matters of subjective self because what they seek to establish or discuss is more fundamental than concepts like objectivity. (Well, cogito ergo sum is establishing an objective fact from a subjective one to give a basis for later objective discovery.) Any full accounting of the world must explain the mechanism by which I experience it, or it hasn't explained the only part of the world Im sure exists (my experience of it), and hence can't be a full accounting. You can have a very good predictive model for features of that experience, but neglecting that experience -- qualia -- is leaving a major thing unexplained. Similarly, cogito ergo sum is likely better phrased as "computation ergo existence" -- the process of doubting is a form of doing something, and so something must exist which is doing that (or is that process). This establishes that there must be some sort of existence, even if it's just a brain in a jar, random memory from quantum noise, etc. You can't doubt there's an existence, because the very act of doubting is proof of existing. You can only doubt the form of it. I also disagree that we'd have no reason to doubt the claim, but I agree we have no a prior reason to reject it. Your edit also makes a major assumption: that we know what causes qualia (our brain structure). That's the very thing being debated, so you're just begging the question.