Embodiment is a key component of human-style intelligence.
For a human intelligence, it's implicit that it can only be instantiated in a single embodiment ever.
If the host dies, the intelligence does too, and vice versa.
You can't copy the intelligence or flash it onto another host.
Too much of the state is encoded in the precise embodiment.
The embodiment sets constraints and goals about what the overall organism finds relevant or irrelevant.
An intelligence that was not embodied, and could be flashed onto many different computers, with instances spun up or spun down at whim, would be very different.
LLMs are able to mimic human style intelligence, but not because they have similar constraints, but because they trained on the persistent residue of human style embodied intelligence: published writing.
But there's some information that persists better than others, and if you only look at it you get a weird biased sense of what it means to be human.
In the same way that some organic materials fossilize better than others so our notion of what historic animals are like is skewed.