I mean depends on education system of course but I hope/assume that the ones who graduated at “the bottom” still showed that they had learned and mastered “enough” to pass the level of required skills to get a medical degree.

Compared with the ones who didn’t graduate, even the ones who are at the “bottom” of the graduated ones should be competent enough to be a doctor. (Otherwise what’s the point with test people has to pass).

With that said unfortunately even in a good education system there probably are unprofessional/immoral doctors who weasel their way through