I agree. The only thing standing in the way is state licensing. The AMA lobbied for medical practitioner licensing in the earlier 1900s on the grounds that they would set high standards for future doctors. The end result was different:
"The licensing boards in each state soon began refusing licenses to health professionals who had not been trained at one of the 'approved' medical schools. Only half of the existing medical schools were approved, so most of the others had to close their doors by 1920. By 1932, almost half the medical school applicants had to be turned away. Those who apprenticed, went to unapproved schools, or developed their own therapies were stopped- at gunpoint, if necessary- from healing. As a result, the number of medical doctors per 100,000 people dropped from 157 in 1900 to 125 by 1929. Specialists, such as midwives, were usually forbidden to practice unless they had a full-fledged medical degree."
"The licensing boards in each state soon began refusing licenses to health professionals who had not been trained at one of the 'approved' medical schools. Only half of the existing medical schools were approved, so most of the others had to close their doors by 1920. By 1932, almost half the medical school applicants had to be turned away. Those who apprenticed, went to unapproved schools, or developed their own therapies were stopped- at gunpoint, if necessary- from healing. As a result, the number of medical doctors per 100,000 people dropped from 157 in 1900 to 125 by 1929. Specialists, such as midwives, were usually forbidden to practice unless they had a full-fledged medical degree."
Source: http://www.ruwart.com/Healing/chap5.html