Medicine is not a one size fits all, and I’m sure something similar was done to naturopaths, as well as other forms of medicine to somehow make them “disappear”. Egregious sh***, to say at the least.
"As part of the merger agreement, the College of Osteopathic Physicians and Surgeons was renamed as the California College of Medicine and accredited as a MD degree granting institution. Additionally, an initiative, proposition 22, was placed on the state ballot during the November 1962 elections that would limit the osteopathic state licensing board from administering new licensing. It could still renew licenses of DOs until the number of practicing DOs diminished to less than 40, at which time it would be dissolved and the remaining DOs transferred to the jurisdiction of the state medical licensing board.\
The California Medical Association (CMA) issued MD degrees to all DOs in the state of California for a nominal fee. “By attending a short seminar and paying $65, a doctor of osteopathy (now Doctor of Osteopathic Medicine) (DO) could obtain an MD degree; 86 percent of the DOs in the state (out of a total of about 2000) chose to do so.” It also placed a ban on issuing physician licenses to DOs moving to California from other states. However, the decision proved to be controversial.” - Wiki
And you wonder why people don’t know what DOs are in the SF Bay Area ::eye roll::