[robert4]

I think it makes more sense when you rephrase it and drop the ask for proof to something like 'I would be interested in some scientific studies on the safety...' (at least I would, having considered visiting a chiropractor recently for back pain).

Medlife Crisis has a good video talking about the placebo effect and the promotion of pseudoscientific treatments that's really worth a watch:

https://www.youtube.com/watch?v=jQw2B0vCPYo

tl;dr In the video, he captures my concerns perfectly about the whole thing, "by mainstreaming and legitimising practices outside proven science it increases acceptance of things that don't work, and regular people can be harmed through neglecting effective therapies"