Well, we’re talking about the kind of modifications that ordinary, non-invasive, high-level methods, acting through the usual sensory channels, don’t allow. For example, no amount of ordinary self-help could make someone unable to feel physical pain, or can let you multiply large numbers extremely quickly in the manner of a savant. Changing someone’s sexual orientation is also, at best, extremely difficult and at worst impossible. We can’t seem to get rid of confirmation bias, or cure schizophrenia, or change an autistic brain into a neurotypical brain (or vice versa). There are lots of things that one might want to do to a brain that simply don’t happen as long as that brain is sitting inside a skull only receiving input through normal human senses.
Well, we’re talking about the kind of modifications that ordinary, non-invasive, high-level methods, acting through the usual sensory channels, don’t allow. For example, no amount of ordinary self-help could make someone unable to feel physical pain, or can let you multiply large numbers extremely quickly in the manner of a savant. Changing someone’s sexual orientation is also, at best, extremely difficult and at worst impossible. We can’t seem to get rid of confirmation bias, or cure schizophrenia, or change an autistic brain into a neurotypical brain (or vice versa). There are lots of things that one might want to do to a brain that simply don’t happen as long as that brain is sitting inside a skull only receiving input through normal human senses.