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I rather believe experiment than an "advanced theory" which you are clearly not capable of understanding to such an extent that you can explain it in terms of the physics involved.
No, you simply lack the education to understand it. Why don't you learn the theory?

BCS theory is also descriptive but at a deeper level. It does make nontrivial predictions.

You are wrong about what you write about the Meissner effect and you have zero credibility because you think that a steady circular current will radiate EM radiaton because ''the charges are accelerating toward the center''. Now you tell me to study undergraduate physics?