Please, don't even try to lecture me on anything. Seriously, don't even try. I know that we are on Head-Fi where they believe that magic exists and other nonsense, but don't tell me anything that can't be backed up with real world measurements. Just don't.
As for the rest of your post, actually I agree with you, because what you said is actually scientific evidence, not magic. But read me again : I never said that you could make one headphone sound EXACTLY like another. That is of course impossible. Just like it's impossible to get a perfect FR when equalizing a room with DRC software.
Headphone drivers and other physical characteristics are of course different and you can't change that. You can however use AutoEQ to make a headphone sound like another (not EXACTLY like another, but quite like another), and even adjust things manually afterwards to your liking. Of course that's not possible with all headphones, and some have more potential than others for that kind of operation. If your headphone has good drivers to start with (like the Nighthawk has), then you have already a good part of the potential to "imitate" many other headphones with it. Of course you can't imitate an open headphone with a closed headphone and vice-versa. Some things are impossible, but I thought that was obvious.
You can also make one pair of earpads sound quite like another, but not EXACTLY like another. I thought that was obvious too. But again, for most people it will be "good enough".