Fear of the unknown is a common human trait. In a broad sort of way, there are plenty of people who are more open minded. Although there is a sense of ridicule that can come if you speak openly about believing in more. It's interesting because a huge population believes strongly in religion, which is chock full of the supernatural like rising from the dead, parting an ocean through magic, or repopulating the Earth with only two of every species. But you bring up dragons and they think you're crazy.