Atla wroteIt doesn't get interesting until you analyze why it is a bad concept. It is because when you make an attempt to observe a thing, any thing at all, absract or otherwise, you cannot extract the thing from the ideas that define it, give it context. There can be no "naked eye" because to observe at all is to do so with an already established set interpretative categories. You're not really ever "seeing" an object for what it is. You are seeing it "as" what you experiences, your science and so forth tell you.
Dennett seems to be saying that all quale are illusions, which may be one of the (if not the) worst philosophical ideas in history.
Quale have no meaning however. Meaning itself is another qualia.
So this idea of qualia would have to be observation minus interpretation, and the nearest we can think of for this would be an infant in crib.
The question it ethics is not about something being free of interpretation for interpretation is always there. It is about if something that is being interpreted has a nature that exceeds the limits of what interpretation imposes. Value experiences are like this. A needle driven into your hand, e.g., has this "presence qua presence" that is a there-for-interpretation prior to interpretation and it is not simply theoretically understood, as the color yellow wouldl be. Note when you observe the color yellow, you "know" it as yellow, but the knowledge is a body of past experiences brought to bear on it that give you the language and the many contexts of discussion.
But also, it is all too clear that what you are facing as you observe is not a particle of language. It is entirely other than what can be said. Hence, the impossibility of qualia. What is "there", the moment it is taken up as a knowledge claim, is already categorially contained, but the intuition, what Kant called long ago, sensory intuitions" are these weird, stand alone presences or actualities that will not yield what they are.
Ths is what Husserl called the transcendental horizon of intuition.
Ethics is not like yellow in that the value that constitutes it is an intuitive presence that has a nature, that is, in the presence qua presence of, say, terrible pain, there is the ethical dimension. Ouch! is very distinct. you don't find this in yellow qua yellow. It is sui generis, and at the basis of the thesis called moral realism.
Good luck with that Atla. There are few here that see it like this, but frankly, this is because they really don't understand it. Before you exercise your default, reflexive objection, at least think it through.