Or in other words: if you're affected, you don't mind.
(I'm not even joking. If you're researching a substance to use it for others, you definitely need it to control for placebo. But if you're doing it just for yourself, you only need it to work, no matter why. Another story is if it stops working)
Placebo is a baseline effect. It's a hurdle to clear to show efficacy above the minimum any substance can meet.
I've heard this argument before, i.e., placebo is an effect therefore why not, but I cannot understand why time and money would be committed to an activity or substance that is only as good as any other activity or substance.
Placebo should signal: move along, nothing to see here!