Why does the fact that the construct is made of objectively non-human parts make it incapable of obtaining consciousness or personhood? This is just the materia

Why does the fact that the construct is made of objectively non-human parts make it incapable of obtaining consciousness or personhood? This is just the materialism vs idealism debate. If you subscribe to the materialism argument, then a construct made of non-human parts is perfectly capable of reaching "personhood". The physical ingredients involved are irrelevant.