I see an awful lot of posters bringing medical degrees into this. I didn't live with a med student, but I did share a flat with a vet student many years ago, who was on a very challenging course.
Her degree was four solid years of education. IIRC, 2-3 years were classroom based. The final year was all practical. The year before that may have been practical too. And yes, to pass her course and be awarded a veterinary degree, she needed to pass a practical exam during the last year, or she failed the whole four years.
But having a year or two of hands-on practice where you apply all of your developed in-class knowledge to a real world situation, and then performing what you've learned during that practical year in a practical exam, is not the same as cramming some facts about animal biology at age 17, and then spitting out those facts within some multiple choice answers, a few short answers, or maybe a slightly longer-form essay. One experience not equals the other.
Stop panicking about these A grades (and please leave our kids who didn't earn As alone too...). You're probably not going to get a doctor someday who was babied through uni but doesn't really understand human anatomy. You might get a doctor who would otherwise have been shut out of their calling under the old system, but who was diligent during their classroom and then practical training.
I hope the exam system changes for the better. Coursework should absolutely matter more.