Is is though? I am not familiar enough with US degrees but I don't think that a master or PhD in medicine is significantly more expensive than in another discipline (computer science, engineering, electronics, maths and statistics if we're talking about the HN and GAFA population).
Yes it is more expensive. “The median cost of medical school attendance, including living expenses, was $60,945 a year for public medical school and $82,278 for private medical school.”