Somewhat related question: are there proofs that meditation benefits do not come exclusively from placebo effect? Meaning, if I'm able to convince you that a ce

Somewhat related question: are there proofs that meditation benefits do not come exclusively from placebo effect? Meaning, if I'm able to convince you that a certain ritual (however esoteric) is good for you and you end up doing it on a regular basis and this ritual is somewhat different from meditation, will you reap less benefits than with meditation?