What kind of causality is this, given that you assert that the correct thing to do in smoking lesions is refrain from smoking, and smoking lesions is one of the standard things where CDT says to smoke?

Recursive causality.

"A causes B, therefore B causes A" is a fallacy no matter what arguments you put forward.

Perfect mutual correlation means both that A->B and that B->A.

CDT asserts the opposite, and so if you claim this then you disagree with CDT.

No it doesn't.

You don't understand what counterfactuals are.

A counterfactual is a state of existence which is not true of the universe. It is not a contradiction.