make believe

Since we were young our minds were wraped around these stories of make believe,and stories about once uppon a time and happily ever after,but why is it that once the stories are over we're told to grow up and face reality? 
 They look into our eyes and say we can be anything we want,a president,a singer,a baker,a doctor or a teacher, so why is it that when we go to school we're taught to sit down and listen to what one person has to say! last i checked my teacher wasnt the President,or a singer or even a a baker but just a person who choose to be a teacher!