Why are Black women stereotypes so strong when most Black girls aren't like that?

Once stereotypes are established they don't just go away. Also we live in a world where people like to hold stereotypes to each ethnic/cultural/ETC. group. I'm black and I know where you are coming from. I am similar to how you describe yourself however, I know MANY loud *** annoying illiterate black chicks. I don't care about negative or even positive stereotypes. I am who I am and no one is going to know who I am until they get know me. Let people think what they want because at the end of the day you either fit the sterotype or you don't...