Most young people choose subjects and careers on advice rather than evidence. Structure changes the outcome.
Career advice is abundant and evidence is scarce. A student choosing subjects at fifteen is usually working from family expectation, peer choice and a general sense of which professions are respected — not from any structured understanding of their own strengths.
Structure does not remove judgement from the decision. It gives the decision something to stand on: an explicit view of strengths, interests, alignment and the pressures that will shape how a person performs in a given environment.
The institutions around the student benefit too. A school that can see the aggregate profile of a cohort can plan counselling, subject capacity and support with far more precision than a school working from impressions.