I was thinking about your question as I was walking the dog this morning. Like everything else in medicine, there a lot of nuances and context involved.
First of all this is an unusual Year. We're in the middle of a pandemic, don't you think that might have played something in the way the match turned out? An N of one is not a trend.
Second, as back2basics has pointed out, admissions committee members have a challenging job. First off, we're not mind readers. That would make our jobs a lot easier actually.
Secondly, there's no way of screening out people who aren't interested in a career in medicine, but are doing it just because the parents force them to. Do not underestimate the damage tiger parents can do.
Third, as med ed has alluded to, no matter how much good advising you can give people, you can't make them take their medicine, just as one can see with non-compliant patients.
Some people simply are advice-proof. I can probably come up with an interview question about that!
And is also mentioned, medical schools are loath to get rid of problematic students. We simply are addicted to the idea of helping people get across that graduation stage at the end of their four years.