Maybe I misunderstand, Why is it an arguments against qualia? Qualia doesn't deny a neural substrate, just that qualia isn't reducible to the neural activity, b

Maybe I misunderstand, Why is it an arguments against qualia? Qualia doesn't deny a neural substrate, just that qualia isn't reducible to the neural activity, being that one is objective and the other is subjective. It's sort of the difference between logical supervenience and metaphysical, or weak emergence and strong emergence. Qualia being something additional to the neural description.