In my country, we have public exams to get into Uni, with the ones for high demand majors being very competitive, but performance in that exam is not a good predictor of academic performance.

The guy who got into my uni class as #2 in that exam dropped out after a few semesters because he couldn't beat calculus. The #4 took several extra semesters to graduate despite not working/not interning. Several others in the top third struggled through. We had _maybe_ 2 or 3 guys who straight-A'd the entire major.

I myself got in as #17 and still failed a few courses. Thankfully no one cared throughout my professional career.