Consequentialist ethics would suggest the answer is yes, but in your example perhaps a better result would be getting the same placebo effect benefits from some kind of treatment or remedy that might actually work in itself, beyond placebo. Indulging woo isn't necessary to get positive expectation health benefits.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.