Physicians may have more training in the *practice* of medicine but they get limited exposure to epidemiology, virology or statistics. Plus virology has changed dramatically in the past 30 years..
Unless a physician did a joint MD-MPH they would probably have little to no expertise in quantitative analyses. That's why the New England Journal has epidemiologists and statisticians on their review boards. OTOH a nurse with a master's degree probably has had 2 or 3 courses in statistics and those with a DNS probably have had a course in multivariate statistics.
Logic says, if you claim to be an expert in A it doesn't make you an expert in B.
See post 85 for a more detailed explanation.