So what would it mean for us to not really have sensations of color, sound, etc? People can be wrong about some of their experiences, but those would be called

So what would it mean for us to not really have sensations of color, sound, etc? People can be wrong about some of their experiences, but those would be called illusions or hallucinations, not lack of experience. Illusions and hallucinations are themselves kinds of experiences, even if the experiences are faulty. You can dream about all sorts of ridiculous things, but it would be very odd to use that to claim that you don't actually experience dreaming. If our internal experiences are the result of self-interpreting an internal model, that doesn't make the experiences go away. It means there's something about that activity which causes subjectivity.