At best, you can put forward a thought experiment that starts with, "Suppose there are beings which are not animals but which are nonetheless conscious." I'm questioning the premise of that thought experiment, however, because so far as we can tell, there is no such thing.
In other words, computers are not conscious because they are not animals.
This may seem like circular reasoning, but not if you take the view that consciousness is a fundamental property of animals as opposed to an emergent property of complex systems.
This creates a blind spot where an area of non-knowledge is assumed to be known about, and rejected out of hand. I have to point out that taking the view that consciousness is a property of animals does not exclude non-animals having it.
Even then, there will be a tussle over the exact line of what qualifies as an animal for the purpose of consciousness, resulting in the need to answer the same generalizations (e.g. intention, mood, emotion) that would allow yet undiscovered but plausible forms of life to qualify as conscious.
I’ve long been of the common-in-tech-circles belief that at some point in the future we will be able to create intelligent, conscious machines. Where my view on this fascinating issue is shifting is that I’m much less convinced that our animal nature is immaterial to this task.
In any case this has been a fascinating and insightful conversation and I appreciate the opportunity to have it with you and the other commenters here.