There are plenty of complex things in the world that are difficult for people to understand. But that doesn’t mean there is no one in the world who has read and mastered those subjects. The world has more than seven billion people and all of them have different aspirations. All of them want to study something different. There is enough diversity when it comes to choices within a single family. You can find a scientist and a social worker in the same family despite the two being completely different fields. Mathematics may look too difficult to some people. These are the people who can’t wait to get to the class where studying Mathematics won’t be compulsory. But then there are also those who do a PhD in Mathematics because they are fascinated by the way numbers work.