Our sensorium could be indistinguishable from how it'd be in a simulation without impacting my point. Software can hop from host to host (all Turing machines can simulate each other) but living intelligence is embodied.

Because of this, no matter how "smart" computers get, we can't trust them not to do stupid stuff. They are smart like that kid in high school who comes up with a formula to turn the world into silly putty, and is stupid enough to use it. There is more than one kind of intelligence, here the argument is that some kinds of intelligence require having skin in the game.