I've seen others express the same sentiment. Your explanation may be true, but I think a parallel explanation is also probably true: they are unprepared for a fight with a skilled opponent.
I agree that "unprepared for a fight with a skilled opponent" is true for many Aikidoka (perhaps they are more self-aware of their limitations than students of other arts?), but it's also true of Cat Zingano ;)
My point, made in jest, was that even the most seemingly prepared, skilled, and qualified person can be unprepared for a skilled opponent. I was aware of her record, hence the example. Perhaps I'm misunderstanding you?
She's demonstrably prepared for a fight with a skilled opponent. She's just not prepared for the most skilled opponent - but right now, it appears that no other woman on the planet is. Surely our bar for "skilled opponent" in this discussion has not been Ronda Rousey, a bronze medalist in Judo and the most dominant female MMA champion, ever.