Apologies, I should have written: "Based on my training, XXX doesn't know what he is talking about" often leads to missing important points."
This is an attitude that most have us have to be aware of, not least me!
to my mind "Aiki" is a very personal skill and so how you describe it may vary to your point of view, which will develop according to your ability.
The point is, that you have to start somewhere. You have to surpass the threshold of not being able to do anything without resorting to usual power and physical technique to a state of being able to do something for the first time.
You have to precondition your body for that a bit. The best thing I have seen so far on the internet to lead you there in a fairly rational way is what Sam Chin is doing in his videos. His is a very modern approach. You may not agree.
Kimura is not intentionally vague, to my mind, because he has tried to give a clear as possible to him definition of "Aiki" as he saw it in 2005 via the french edition of his "My 20 years with..", but the translators, clearly, indicate that his view has already changed ever since.
You might ask Stan Pranin about how Kimura felt to him, because he is supposed to have felt him on more than one occasion in the past.
We may disagree about Kimura, but, as far as I can follow her, Cady as usually knows exactly what she is talking about.