I never said I have no interest in my field (in fact, I wouldn't spend four years studying it).
While that sounds as a valid option, it's not really an option of you need a visa. I went to a career fair - hit it off really well with a few recruiters at big companies (some didn't even notice my accent), and when we got to the point of scheduling an interview I mentioned the need for work authorization. All of them backed away. One of my friends happens to be a recruiter at an engineering company, and he mentioned it's always very unfortunate when he meets great foreign applicants because he politely has them submit their resumes at this website that in fact is a giant black hole. And yes, while there is an option to go back home and work there for a couple of years, the healthcare system is terrible there, and hence there aren't the greatest healthcare consulting job opportunities. If you tell me to use the opportunity and change my country's entire healthcare system... I mean, let's be realistic.
I want to add that visa definitely isn't my main reason to get an MBA (I'd definitely seek cheaper ways to do that). I know what I want to do in the future, and I know that an MBA can get me there.