If qualia is just an emergent property, it should follow that ethics exists just as a means to achieve a practical end like order or societal stability. What would be the answer to "in an isolated universe, would torturing a being capable of experiencing qualia be good, bad or neither?". I can't accept it would be neither. Pain is negative and that's obvious to me even though I'm a masochist. Suffering is negative if you want to get more precise.

I don't know what qualia is, but it IS something. Some people don't seem to get any arguments and debates about it, at all. Others do. I doubt the people that don't get it are zombies but it's weird that someone can't even comprehend what the issue is about. When I say "red" or "pain", they talk about neurons and whatnot. Of course that's true, but don't they feel the redness and the pain subjectively in a way that makes them question how that feeling relates to the atoms, neurons and other levels of abstraction could be used to describe the physical reality?

And I think, having read a bunch of philosophy years ago that solved nothing, dualism or not is not the right question right now, in our level of understanding. It's not even the right answer because what's "physical" is not well defined either. If we can explain qualia, why would that explanation not count as a "physical" one? If there's some logic to it, it's as physical as anything else.

Lots of ill-defined questions and assumptions. I think we should accept qualia is not understood and won't be for some time. We should realize we can suffer and so can beings similar to us. Where do we draw the line - we'll have to base that on what we know about biology. To me it's obvious many animals are capable of suffering. I think that's a good place to start with our ethics. Suffering is shit, let's reduce it as much as possible.