The point I was making is that we do not know what consciousness actually is. Until we do, we have no way of telling whether my impression of my own consciousness has any reasonable relation to the reality of it. It is meaningless to try to determine whether or not it is an illusion without first having an understanding of what consciousness is.
More directly to the argument I was addressing, the point is that whether or not the commenter I replied to is right and there'd be no "me" that could live on forever, that is really rather irrelevant to the "me" that believes I am conscious.
In other words: While I need clarity in what consciousness is to be able to even begin to address whether or not what I have is truly consciousness, it really doesn't matter to the question of whether or not whatever I am sees value in a process that'd let me live on.