If you want to lose faith in humanity, start asking people which is farther away, the moon or the stars. Most people have no conception that the sun is a star, and would have trouble processing it.
How are those two things related? The sun is the closest star to us and is still further away than the moon. The answer would be “the stars” regardless of whether or not the answerer knows the sun is a star.
I mean, I tend to agree, but on the other hand it takes a certain kind of curiosity to care deeply about things that don't affect our lives in the slightest. You could argue that astronomy and cosmology is important today, but during most of evolution it really didn't matter. I guess it started paying dividends for planning the crops and harvest etc, but still that is quite late. So in that sense, caring about e.g. disease, biology and our immediate lives here on earth seems a lot more "sane".
