> And then, from the perspective of ethics, once you know it's just placebo, you kinda shouldn't keep giving it to people, even if it helps?
That's a very big ethical question in the medical field. Placebos _do_ help, but only if people believe they will. So is it ethical to lie to a patient and give them a placebo knowing it's likely to help?
If you're a doctor, and if Prozac helps your patients, then it's obviously excellent. You should keep writing prescriptions.
If you're a scientist, you obviously want to distinguish between "real" drugs and drugs that help because people believe they should. So, you do these kinds of tests.
And then, from the perspective of ethics, once you know it's just placebo, you kinda shouldn't keep giving it to people, even if it helps? Maybe? I don't know. That's the weird part.