Because I do.
Just like you choose to call whatever it is you call Aiki, Aiki. I'm not sure why I need to "justify" anything. That's not what this thread is about. If you would like to start a thread talking about "justifying" what you call Aiki, feel free.
I tend to agree with Greg's opinion of what's going on here, so I'll step out after this post since you started pretty much the same thread previously for pretty much the same reasons.
Anyway Mark and others have laid out quite a bit of historical material in support of their positions, I guess that's what a search engine is for.