[IshKebab]

This is likely wrong because you're assuming there is some secret sauce in biological brains that lets them do something that cannot be simulated. That both seems very unlikely and also we've never found anything remotely like that by observation.

Of course it would be extremely difficult to simulate a human brain but as far as we know there's no fundamental physics preventing it.

And yes that does have super weird consequences about consciousness. But consciousness is clearly super weird already so I suppose that's not too surprising.