Education - like travel or experience - broadens the mind. Some argue that if you stop learning and growing; you stop living.
I’m sorry, but someone who does not know which war came first fits the narrative of some dope smoking, mouth breathing, basement dweller waiting for the next welfare check while watching The View.
Why is there food on your table? Because you know where the grocery store is.
If you don’t know which war came first, then don’t worry. Chances are your Mom knows. Just like she knows where to buy your Mac and Cheese dinners.
(Not directing this at you personally, I know you are educated.)
Or maybe they just learned other stuff. It’s a big world, lots of stuff to learn, an ever increasing quantity, and our time and capacity to learn is still finite. And there’s also the difference between “don’t know” and “don’t remember right now and looking it up is faster than racking my brain”. And these computers and the wiki and the google a lot of us find that second category growing at a rapid rate. I look up lots of stuff I know I know, but it’s not on the tip of my brain and there’s this W next to a box on my browser. Heck I even look up stuff I know just to make sure I got it right (like that Napoleonic thing, I did a quick wiki poke just to make sure).