If it did it wouldn’t exist because it would be eaten up by cancer research. The most promising right now for an all around cure is capsicum treatment it’s just finding a way to sedate the patient and not killing them.
I would look at it this way. There does not seem to be an adverse effect from drinking this tea and it might have some benefits, so why not give it a shot if you want and there is not a medical reason to contraindicate it.
One should not, however, consider this a replacement for medical treatment.