That article makes it sound like starting Facebook.com's and making a million bucks a year in private equity is easy.
Yeah, I love it when investment banking is constantly being brought up as if every Joe Schmoe can get hired into one of the big player firms starting at 150k.
I have cousins in IB and private equity, and a good buddy doing M&A for a smaller regional firm in Detroit. So, I know a little about that "field".
First, you need to be smart, but also extremely hard working. You'll need to be more aggressive than most people in medical school are, by nature. Pedigree does matter. So, a reputable undergrad is important. Internships at large NY firms are very competitive, but will help land an associates-level job. Then, plan on working 80 hrs/week for several years as you prove yourself. Next, go get an MBA from a reputable institution (my cousin went full time), because to move up you'll need it.
Oh, and if you can't work under enormous pressure, forget it. You better be able to present to high level dudes making millions/year. And, you'll need to be convincing, so no sheep need apply.
I'll admit, there's not one single path to these jobs. Finance is even more diverse than medicine in many ways. For example, you could work in trading, then get a CFA. But, you better be very good, smart, aggressive, and presentable if you want to manage private equity. These people are NOT your average finance grad.
My point is that anyone that gets into medical school (pretty competitive) will more or less eventually make a decent living. But, it's only a very, very select group of people that make the kind of numbers often refered to in such articles. While there are a few regional players, and "local" private equity firms, the majority of the jobs are in NYC. So, if city life isn't for you, then it excludes you from a large segment of the higher end jobs. That's simply where much of the action is.
Granted, it's not fair to compare your "average" finance grad to the average medical student. No comparison. But, these articles make it sound like all you need is a finance degree, an MBA, and you'll be off making $150 + right out of school, with the potential to make "millions". This is very far from reality. So, don't be overly persuaded that you've made a "suckers" choice by going into medicine.