Quote from heech:
32'ish is optimistic.
The average age of medical school admits is something like 26. (Many have to do post-baccs to qualify; others work as EMTs, nurses, or anything else.)
From there, it's 4 years of medical school, and then a minimum of 3 years of residency (for family practice). A young 33 for the very fortunate family doctor. The typical debt load for the 33 year old is about $250k.
For a cardiothoracic surgeon, it's 7 years of residency for surgery, and then additional 1-2 years of fellowship residency. So, 39 is probably the average age for cardiothoracic surgeons. Typical debt load is even higher. Note: 39 years old, with zero financial assets, but about $300k in debt.
The workload of any of the surgery specialties is also off-the-chart insane. I thought my friend on partner-track at a top-10 law firm had it rough, but... now I know better.
I am speaking as the husband of a family-practice doctor to be.