If that's the case, could doctors just make the judgment call to prescribe a placebo in some cases and see what happens? You have a tough-to-place pain in your arm. Doc tries a few things and then decides to prescribe Panaceanol(tm), a new Merck placebo that is just sugar. A week later, you feel fine. You've triggered your own body's ability to deal with the injury/illness, introduced fewer chemicals, and done so more cheaply. The cost was, in part, having to fool you into doing it. Is it worth it?
Most importantly, is there any way to permit Drs. to do while mitigating any chance for abuse?