I will say thought, that this is a really typical path in the US, at least:
* 4 years undergraduate ($200K debt, high competition/workload)
* 4 years medical school ($250K debt, high stress/workload, 50% odds of not being accepted)
* ~3 years residency (pay only $50K/yr, famously high stress/workload, possibility of being separated from loved ones or making hard choices in residency match)
So assuming starting undergrad at age 17, you have had a tough 11 years and are at least $300K in debt by the time you are 28 and getting your certification. This is ignoring specialties with fellowships. I don't have the time, but I'm sure it's possible to estimate the quality of the time sacrificed to education and lost compensation during that time and then amortize that over a typical career.
And the field is different... after all of that training they get to spend an inordinate amount of time doing paperwork/fighting with insurers, which (seems to be) leading to more group practices with workloads like those described in the article.