alt Hacker NewsYou need to draw that thinking out to it's natural conclusion, though. If I cut out your brain and stopped you from hearing or seeing or feeling - you would still be a conscious human being capable of thinking and awareness.
If I hooked up electrodes to the hearing centers of your brain and force fed you dialog you perceive as speech (but is really a great deceiver), then responded in what you thought was speech (but are really just probes I use to convert your thoughts to text), that wouldn't suddenly be less real to you. It wouldn't devalue your sapience.
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How do you know the brain separated from the rest of the nervous system and body would still be sapient, capable of thinking and awareness? There's an assumption you're making that the brain is all that's needed, but the nervous system extends throughout the body. One can argue sensory organ are part of the nervous system.
Embodied cognition rejects this assumption. We didn't evolve as brains that were then put in bodies, we evolved as bodies with nervous systems.
Mind-body dualism is not real. Even in your example, you would be building upon a minimal part of a person's body.