Let's assume you are right and the positive effects were completely attributed to placebo effect. If placebo effect is an effective treatment that results in a cure, what exactly is your complaint?
Did you mean it's not medicine because it's not reproducible? I don't really understand the statement either way tbh.
Let's acknowledge that my question also assumed the most favorable scenario for your argument. Most objective observers would agree there is a nonzero chance that the treatment was not totally based on placebo effect, but rather on undiscovered science. You do understand that, right? That not all science has been discovered, there are many things we do not know or understand, and yet are true. If we cling to what has been proven and refute anything else, we freeze all progress. I can think of nothing less scientific.
It's not reproducible because it's not medicine.