I'm not sure if the chances of success are any higher for getting into a medical school in the US. As a one-shot thing, a FAANG interview loop may be tougher, but there are a lot of big tech companies and you can keep trying your luck. I think Amazon alone has like 50K software engineers, they churn engineers like crazy and the hiring bar isn't quite as high as some of the others. Whereas if your undergraduate credentials aren't good enough or you simply don't do well on standardized exams, you're kind of out of luck in terms of getting into a US medical school. I could be overestimating the difficulty of getting into the least competitive medical school in the US, but my understanding is that they are all pretty difficult, leading many people to go to a medical school in the Caribbean.