Tbh I am a Geography teacher and there's a lot of geographical knowledge that I need to equip myself with as well. If you ask me processes like how are mountains, volcanoes, tsunamis, earthquakes formed, I can give you the full detailed explanations.
But, really, it depends a lot based on your interest in finding out the flags, currency, location of a nation etc. For example, I teach a 10 year old kid who is able to get all the questions right on this iPhone game which matches countries flag, language, shape of the country on the map, currency etc. He doesn't really know the culture or how the people looks like... but because he's addicted to this sort of stuff, he's able to memorise all of them correctly.
Most people today just don't see it as important. Of course it is still important to have some common sense knowledge of generic questions like how many continents are there, where is China, Australia etc... but really, we don't need these info at hand because we can really just google them.
Which is why I love TAR 28's Roadblock a lot. Like, a lot. It is a task which require some brains to figure out the placement of the flags, over the fact that you know each countries' flag. But it is a task which will reward those who have at least some knowledge of the countries flag as well (Cole) and help them to finish the task better.
All in all, it is important to have at least some Geographical knowledge of some basic info... but really, if you ask me what language does the people in Switzerland speak, I'll probably say English and not even sure if I'm right... because I've just never been there before and will not bother to look it up because it does not concern me.