A wonderfully-constructed argument, MrsO.
But just because I think of our history as trivia doesn't mean I don't think it's important. It's just evidently not necessary to succeed in life. As you have pointed out, your three quiz colleagues, however useless, are also fairly successful with good salaries, etc.. I don't see that not knowing that Leningrad became St. Petersburg makes the slightest difference to their career prospects.
And no doubt they're one-up on you in other areas as well. It's just that pub quizzes tend to require a particular type of knowledge that not everyone has or is particularly interested in. I don't think that matters, and I don't think it makes anyone ignorant. It is frustrating when in a quiz, to be sure. But that's hardly the best yardstick of intelligence.