u asked for studies to prove u wrong & i gave u a 2025 review of 16 papers and now u move the goalposts because u don't like the results.
it's mental health. if a ritual helps someone with ptsd and literally changes their heart rate and brain waves, it's working. hrv and gamma waves don't just 'convince themselves' to change. u can't say it's 'nothing' just because it's not a pill.