Assuming that it wasn't a treack question...yes, graduating from the American medical school makes life a lot more easier, for the most part.
To answer your question why I left...there was a number of problems for me going there to begin with. I applied and was accepted there on a short notice, didn't do much review after being out of school for almost 15 years back then. That put some major strain on my health, and even though I pulled through I new that I was "running on empty". Some of my chronic health problems came to live in quite an accute form. Also, I'm married. My child even back then was already of the school age. There is no good infrustructure on Dominica, and I couldn't put my family through it. B/c deep down inside I've realized that I've rushed into going there. I never even tried getting in U.S, and started cutting corners. Believe me, that "cutting" is liable to catch up with you probably when you least expect to get hit. I just didn't want my dream to become my family's nightmare. Generally, going to the medical school anywhere is going to require some major planning and prep, and even more so when going abroad...without your family, who depend on you. I'm not saying that you won't be a doctor, or that ppl with kids, and families don't go off shore to get their medical education. But it is warranted only as a last resort, and I've used it as my first option, b/c it looked like the "right" and "quick" way to get there. Anyway, I decided to withdraw by taking medical LOA, which is true, and is very well documented. But, I have to do it right this time. Falure is not an option, and I know I will get in in U.S school. However, I'm not knocking the carib option at all. It's a very viable route, and if I didn't have the responsibility to my family first, and everything else second, I'd stick it out at ROSS. But why suffer? It's already a very difficult, and a very, very long road...it's a a marathon, not a sprint.
Best of Luck to all with your choices