That is a good way to think about it. At some point, this becomes partly a matter of philosophical belief.

But I am somewhat skeptical of the idea that everything can be reduced in that way. In order to build theories, we often reduce too much.

When we build mental models of complex systems, especially when we try to treat them as closed systems, we always have to accept some degree of information loss.

So I do partially agree with your point. A mechanistic explanation alone does not prove the absence of consciousness. Human intelligence can also be described in mechanistic terms.

But I worry that this framing simplifies too much. It may reduce a complex phenomenon into a model that is useful in some ways, but incomplete in others.