I believe that certain disorders or symptoms of them can be alleviated through therapy or 'rewiring' as you mentioned. Medication is usually used when therapy is no good due to such intense symptoms.

Even something like a mood disorder can be somewhat managed with rewiring (in my opinion) unless so severe that medication is needed.

I do however feel that certain disorders involving psychosis, as well as above mentioned with great severity, do need medication. Without the medication, the delusions/hallucinations and other psychotic symptoms persist.

To answer your original question- I don't think that medications are addictive per say- yes, the medications may cause symptoms if you come off of them too quickly though. That is one point.