Most of the world’s dualists are substance dualists who believe in a soul, not property dualists who believe in qualia. Attributes of thought, like the ones that you list, may play a part in cementing the idea that mind is different from matter. But the belief in life after death, and survival of the self despite death of the body, must play a huge psychological role. If you can live on even when your body is gone, then you must be some other thing that still exists. Thus the soul, and thus dualism.
Most of the world’s dualists are substance dualists who believe in a soul, not property dualists who believe in qualia. Attributes of thought, like the ones that you list, may play a part in cementing the idea that mind is different from matter. But the belief in life after death, and survival of the self despite death of the body, must play a huge psychological role. If you can live on even when your body is gone, then you must be some other thing that still exists. Thus the soul, and thus dualism.