Of course we can agree to disagree.
I have no problem with people disagreeing with me and I think you and I tend to have a lot of similar sentiments about budo and aikido, even where we describe things differently. I'm offering my view; you're offering yours. I'll only add that where you see covert acton as perhaps necessitating deception, I see it as being essentially invisible. There might be deception involved in addition, but that would imply giving some clue in the first place which strikes me as allowing the "opponant" something to respond to (which can include the consideration of potential deception).
Take care, Graham,
Nice differentiation between deception and covertness. Maybe it's ninja aiki.