Honestly, I think that’s silly. At a college that does no gatekeeping, it’s perfectly possible for a student to get a pretty accurate, experienced read on medical school admissions prospects. And I don’t think people college wanting to go to medical school but assuming that they will be marginal performers academically.
I raised the gatekeeping question because it may matter to the OP in this thread, not to debate the merits of the concept. Ex ante, I don’t think having a gatekeeping committee or not is likely to be a meaningful choice factor for any student. But the OP in this thread isn’t operating ex ante. The OP is already at a specific college.
In planning a somewhat belated shift into a medical career track, the OP may want to figure out what the deal is at the OP’s college. If there’s a gatekeeping committee, the OP wants to know what the OP has to do to get the committee’s support (and to figure out how likely that is to be achievable). If it looks like there’s no way the OP will ever get support from the committee, the OP will need to rethink the flight path to medical school. He or she may have to transfer to a different, open college, or come up with a plan to do the med school requirements in a post-bac program that will substitute for the unavailable committee support.