Bertrand Russell presents this argument in favour of useless knowledge:
“I have enjoyed peaches and apricots more since I have known that they were first cultivated in China in the early days of Han Dynasty; that Chinese hostages held by the great King Kaniska introduced them to India, whence they spread to Persia, reaching the Roman Empire in the first century of our era; that the word ‘apricot’ is derived from the same Latin source as the word ‘precocious’, because the apricot ripens early; and that the A at the beginning was added by mistake, owing to a false etymology. All this makes the fruit taste much sweeter.”
(In Praise of Idleness, 1935)
PS the false etymology intrigues me, but I haven't managed to track it down to my satisfaction