University admission exams are very stressful, but they put everyone in a position where they know they have the same shot at getting admitted.
But how about this: an objective test that anyone can take however many times they want, as long as they have a high school diploma.
That’s essentially the Brazilian system. There are arguments to be made about well off kids still getting an advantage because their parents can afford prep schools, but the government counters (at least partially) that by introducing quotas for certain disadvantaged groups.
I have many misgivings about many things in Brazil, but I do think the university admissions process down there is the fairest I’ve seen in my life.