Sure, why not? Birthday might not be absolutely relevant, but allows to judge your success at school/uni/education much more easily, nationality is relevant to decide whether they would have to go through trouble to get you employed (if non-European), and the employers/jobs of your parents usually correlate strongly with your own qualifications, at least on a quantitative level.

Whether you like the fact that a surprisingly large number of university student has academics for parents, it is still there, and if you want an intelligent person, it might act as a decent filter to look for intelligent parents, especially is said person does not have much experience otherwise yet.

Maybe it's actually because people are less afraid of discrimination there? So they don't have to play it safe.

Wow never heard the parents' employers. It's worse than I thought.