Of course, apart from how the actual implementation works I don't think many people have a problem with that. And if it was just that, Wigner's friend wouldn't be nearly as interesting, it would suffice to say that if quantum mechanical effects really keep working all the way up to the macroscopic level (which again is anything but obvious), that his friend's body and brain would simply be in a superposition of both states.
But this understand of the surroundings and capability to react to stimuli comes with a subjective experience, which is what is actually meant with "consciousness". This is the hard problem of consciousness[0].
But this understand of the surroundings and capability to react to stimuli comes with a subjective experience, which is what is actually meant with "consciousness". This is the hard problem of consciousness[0].
0: https://en.wikipedia.org/wiki/Hard_problem_of_consciousness