That's stretching it. I think I should have qualified domain specific expertise as quantitative-domain specific expertise. Afaik, MD is more about human biology and meant to help you become a practicing doctor. PhD-biomedicine, MPH/MS-bioinformatics, or MD-PhD programs tend to have more substantial quantitative components than just an MD. Caveat: these are gross generalizations. I know some MDs who are competent enough in quantitative analysis to give any engineer a run for their money!

Would an English MA or PhD, for example couple well with an ML-MOOC for natural language processing jobs? Possibly, but would involve a lot of effort to build the bridge. However, if someone has a mechanical engineering degree or a PhD in something similar, a MOOC-ML can work well to position them for a bunch of jobs in large mechanical engineering companies looking to jump on the ML bandwagon or ones traditionally strong in ML-type mechanical engineering like UTC.