Knowledge of any sort is a valuable asset and not to be sneered at just because the sneerer doesn't happen to have that particular chunk. I knew what he was talking about - the twin whirlpools that Odysseus had to steer his boat safely between to return to his home island after 10 years at the Trojan War. Does that make me elitist? I hope not! I thought it just meant that I had read Homer's Iliad and the Odyssey, and (shock, horror) actually enjoyed them.
BJ's education was an old-fashioned one, concentrating on what an educated person used to be expected to know. What hasn't happened with BJ is adding more up-to-date stuff to what he learnt at school. He is still in nineteenth century mode, like his pal Rees-Mogg. He is not PM of the country he was a child in, all those years ago.