You know, I had (or attempted to have) [an] argument (or "civilized discussion" ;-> ) with a very smart person (a computer programmer I've known for decades) and it was impossible for me to get the subtle distinction to register. In his view, saying "the brain is not a computer" is tantamount to being a mystic, or a vitalist -- equivalent to claiming that life, and intelligence, must have a supernatural or non-material basis. I could **not** get past that impasse. So it is, I would guess, with many naive Transhumanists, Singularitarians, and AI enthusiasts. And that's true at the highest levels of what passes as the intelligentsia. I suspect you might see the same misunderstandings spun out if you were to witness a conversation between, say, Gerald M. Edelman and, oh, Daniel Dennett.Mind has been metaphorized as a cloud, as a mirror, as the inscription of a tablet, as a complex of steam-pipes, and on and on and on. Setting that platitude aside, it is also true that many GOFAI ("Good Old-Fashioned Artificial Intelligence")-deadenders and techno-immortalists of the uploading sect (subcultures with more than a little overlap, I might add) seem to reject supernaturalism about mind only to replace it with a kind of techno-transcendental sooper-naturalism of robotic-AI, in which the mind-body dualism of spiritualism is re-erected as an information-meat dualism invested with very specifically false, facile hopes for techo-transcendence.
Of course, any consistent materialism about mind will necessarily treat seriously the materialization of actually-existing minds in biological bodies, and will recall that all information is non-negligibly and non-dispensably instantiated in actually-existing material carriers. The non-negligible, non-dispensable material substantiation of intelligence and mind forcefully argues against the pseudo-science and bad poetry of Robot Cultists who depend instead on inapt metaphors of "translation" and "uploading" and "transfer" to wish away these material realities the better to indulge in infantile wish-fulfillment fantasies about invulnerability from error, contingency, disease, or mortality by techno-transcending the hated meat body as digital cyberangel avatars in Holodeck Heaven and then peddling that priestly con-artistry and New Age woo as science.
Anyway, it makes no kind of sense to pretend materialism justifies dualism but once that irrational leap has been made it becomes perfectly predictable that those for whom the denial of traditionally religious mind-body dualisms does justify robo-cultically religious info-meat dualisms will treat as an entailment of their sooper-naturalist anti-supernaturalism that those who reject their enabling incoherence must somehow be common or garden variety pro-supernaturalists. The "vitalist" charge is just a variation: for the robo-soopernaturalist any materialism that is a barrier rather than a prop for their wanted techno-immortalizing informationalism about mind must be some kind of stealthy supernaturalist luddism. The point to grasp is that for the futurological faithful, one is either a believer in spirit stuff that might live on in Heaven or a believer in info-stuff that might be uploaded in Holodeck Heaven: Actual, this-worldly, secular-progressive, technoscientifically-literate materialisms don't hold much interest for Robot Cultists, you know.