I did actually! Scientific medicine periodically has to reassess its views. That Lancet article should have caused you to reconsider - but it didn't. You obviously have a different idea of debunking from myself. Considering I have never made any specific claims for chemotherapy etc I don't see why you are concentrating on it.
The article you initially quoted concedes that chemotherapy is very effective and curative for some malignancies. "Cancer" is not one disease. You don't expect one Antibiotic to treat all infections do you?