You are being asked for clarification. Answering "That is correct. I suppose it's the way I have always viewed it, and there is no way to prove that it is wrong, and I have seen no reason to change my belief, so it stands as it is." is not clarification. It isn't even an answer. It is, yet again, a stance. A proclamation of you being right and no one being able to tell you that you are wrong. It is unyielding and it shows an inability to actually participate in a discussion because you refuse to acknowledge any position but your own.
Now, if you can add clarification to your stance then you would be participating in the discussion. As is, you are not. You are stirring the pot.
Oh, and to point out the question you have continually ignored and tried not to answer...
"Now, I have asked, repeatedly, for DW to tell me what I get out of my charitable deeds, and she has deigned to ignore the request." Using your rather impossibly broad definition of self interest and that anything ever done is done because it is in one's own interest, tell me what I get out of my charitable deeds. And no deflecting answer of "I can't possibly know that." You claim you are right and every single person on this planet acts in their own interest in all matters, that means you know what each person gets out of it.