I knew a guy who went to Stanford then became a doctor. While his friends were living in luxury in their 20s, he was working 90-100 hours a week and sleeping in a dingy old bed in a hospital room without AC, while he was on call.

It was that point I truly understood what people mean when they say you don't become a doctor for the money.

very few exceptions. Although you do see some in plastic surgery and other cosmetic medical fields.