To be fair, you aren't born with this knowledge and need to learn about it at some point. Vsauce is educational for all levels. Take a video like this one:
That's a seventh-grade (or whenever you learn basic hydrostatics) level problem, yet I could bet that if you were to ask random people "can you drink water through a twenty-metre long straw" you would get mostly "yes" as an answer. Perhaps with caveats along the lines of "you just need to suck harder". The appeal for most people is the lack any maths used in explanation, making it accessible to a larger audience. And props to Vsauce, if I would be put on the spot I would have to use trig as a crutch to explain why the Earth is round. Or hydrostatic equation to explain the straw problem for that matter.
That said, it is baffling that so many people believe otherwise. Not the fact that people are asking this, or any other, question. There are hundreds of basic facts like those that you learn in school but don't retain them for whatever reason. I mean, without looking it up: how should you neutralise the mercury from a broken thermometer? Why shouldn't you open the door if the knob is hot (aside from getting your hand burned)? What's the difference between osmosis and diffusion? Why the steel scissors get magnetised with use and what's the easiest way to demagnetize them? I don't expect you to answer, I'm using it to make some sort of a point. ;)