Steve, I do not find much difference between what I'm saying and what the article you posted is saying.
The chakras concept originated in early Vedic and Buddhist scriptures, where the chakras are a part of another dimension of existence that is oblivious to modern science. It is known as the subtle body.
It cannot be detected directly through scientific processes because it is “non-material”, just like gravity. We can study the effects of gravity on other objects, but we can never know what this force is.
Similarly, we can study the psychosomatic effects of chakras, but we cannot see them physically or know how they come into existence. As of now, there is no scientific proof of the presence of the chakras.
Ths subtle body, or pranic body, is beyond the material dimension, so it cannot be treated by physical science. I can't entirely agree with the gravity concept, a field that can be detected by physical instruments
With your assessments above. How is it that you/we can assume Sri Yukteswar even was talking about a physical corollary?