Leave it to the AikiWeb community to extremely over-complicate a simple point!
Yes, she could also have been an alien from Mars, secretly out to infiltrate humanity, and Aikido was just her backstory. You never know! I also find that highly unlikely though.
Well, you never know. You may find as you go through life that experience teaches you otherwise. There are plenty of invisible ailments and disabilities; it's nowhere near as rare as you think. If you're lucky, you'll never have one yourself.