It's beyond me how cavitation can cause an autoimmune disease, and seems much more likely to me that people are bothered by the sound and settled on a joint ailment as a deterrent.

Osteoarthritis, which is the most common form of arthritis, is not an autoimmune disease; rather it seems to be related to aging, including cumulative wear and tear on joints. (Rheumatoid arthritis is an autoimmune disease.) Cavitation can mess up hydraulics components pretty bad, so I do think this passes the common-sense test. Apparently it doesn't pass the evidence test, though.