Maybe take the 30s needed to do a casual scan of the people who had made it to the short-list before repeating the joke? Each person as well as passing quite rigorous initial selection criteria would have then spent at least 4 (or was it 8?) years of intense training.
If you've actually read H2G2 and the M1 materials (I assume about 5% of people making fun of it) it's quite clear the people they were after were anything but B-ark types.