Actually acupuncture has some studied physiological effects. One is nervous system mediated via the release of endorphins and then a later regulatory rebound which can have an anti inflammatory effect. I think low dose naltrexone has a somewhat similar method of action. I might have the details a bit off but the studies definitely exist if you want to research it. There are even some compounds in coffee (some of the bitter compounds not the caffeine) that have a very mild effect that works in a similar way.

Personally I’m not a fan of acupuncture and I suspect any nervous system benefits from acupuncture would be far outweighed from those of regular exercise. But maybe for people with chronic pain or other issues it could be useful.