Yes. It is the same real, measurable response you would get from an effective medication even though no medication was given. In many cases the rate at which placebo occurs is surprisingly high. (https://www.medicalnewstoday.com/articles/306437)
I know what placebos are. But the effect is created by telling the patient you gave them medication. So I don't believe it's possible to make "treatment by placebo" a standard.