The more you know, the more tools you have in your toolbox when the unexpected comes up, in theory. But life isn't always like that, and instead, we often end up with wads of useless knowledge crowding birthdays and anniversaries out of our heads, like a hoarder's house eventually splitting its walls.
What can you do? Just because tidbits are useless doesn't mean they're not interesting. Heck, they can be downright fascinating.
So you keep plugging away, because you never know, these kinds of things might end up being useful one day. Hoard away! They're only facts.