Not at all. Your criticisms are entirely valid and I accept that. But you've oddly mistaken a rebuttal for something it just isn't.
You're free to openly criticise my post in this thread, just as I'm allowed to reply to said criticism. I've taken what you've said (and Rogerborg) on board and reduced the price. So I do appreciate that.
There's not much else to it, if you were expecting a hissy fit then I'm afraid we're at an impasse. Hopefully the next person will prove more entertaining?