Honest question. Instead of institutions declaring that so and so is certified in a field, why not let employers make these decisions based on the work that the

Honest question. Instead of institutions declaring that so and so is certified in a field, why not let employers make these decisions based on the work that the student has produced. Particularly for the STEM fields, let each student publish their thesis or project work in a publicly available repo and rather than evaluate someone on GPA or degree, evaluate them on whether their domain knowledge is good enough.