Jambone,
That is the purpose of it. To separate those with experience and without. They don't want people that have just finished school and didn't do any extra-curricular activities for example, or someone that has spent the 5 years after leaving school doing nothing. They have to find a way to reduce numbers even further than just the academic qualifications. If you have a question set that everyone can answer equally then there would be no point in having it. It is another way to reduce numbers, it has to be biased.