Who are you to judge? While some people are unfit to study medicine, others end up making fine doctors, even after they have studied in the Caribbean.
Who am I to judge? I'm someone who personally knows people who tried going the Caribbean route only to come out with no degree, or a useless degree, and hundreds of thousands of dollars in debt.
I'm not clear on the point you were trying to make with someone else's *optomistic* numbers. I've run them before in other threads and come up with the likelihood of getting into a residency if you are student starting out in the Caribbean is more on the order of 25%. You have to consider that well more than 50% of students who start in the Caribbean do not graduate. I think that is a generous number, but let's use it.
So, 100 start, and only 50 graduate, consider that only 50% of those have historically ended up in residencies. (Let's not quibble about the exact percentage, especially since again, I'm actually being generous to start... and that number is likely to fall as the AOA/ACGME merger tightens up available residency spots even while graduating DO numbers climb.) The result is 25 of 100 people who started out in the Caribbean end up in low tier residencies, while 75 are deeply in debt with no hope remaining to achieve their dreams.
It is the equivalent of buying lottery ticket that costs $300,000 and several years of your life which gives you, at best, only a 1:4 chance of becoming a doctor. If you have $300,000 sitting around, and no other hope, then you still shouldn't do it. You could have invested a tiny fraction of that and a year or two into getting your academic situation in order so that you could get into a domestic school at which your chances of graduating and matching are more like 95+%
No matter how you look at it, the Caribbean is a bad deal. I'm not disputing that there aren't any fine doctors to ever walk across that minefield. It's just that they were the outliers who happened to make it across. The broken and mangled lives of their classmates aren't as easy to see, unless you do actually run the numbers. Anyone who comes out of the Caribbean as a fine physician could have done it in a US school with less trouble, expense, and risk. And so could quite a few of those who didn't make it, if they hadn't wasted their chance by going offshore.
EDIT: To be clear... gonnif was using numbers for the BEST offshore schools, but all students who go Caribbean aren't going to those. If you prefer to stick with that, go ahead and say that as many as 40% of people who matriculate in the Caribbean might get a residency seat in the US. That still doesn't begin to compare to a 90-95% chance at a US DO school. You have to compare all who start not just all who graduate, since the Caribbean schools, even the BEST of them, lose at least 50% of all who start at them, by design. American schools don't try to weed out their classes like that.