I was thinking about the ridiculous level of influence held by playwrights in Ancient Greece, so much that they were essentially politicians. As we see specifically in Medea, Euripides uses his plays to comment on social and political issues. Seriously, using plays to comment on and make changes regarding society and politics was absolutely brilliant. Even in the BC days people were obsessed entertainment and public (aka famous) figures. Plays to the Greeks were like Hollywood blockbusters to us and playwrights to the Greeks were like Oprah or Lady Gaga to us. Think what you may, but Lady Gaga has major influence over her millions (or billions?) of fans, and she uses her influence to comment on social issues like gay rights (Listen to "Born this Way" if you don't believe me).
Imagine you had Harry Reid, the Senate Majority Leader and a supporter of same-sex marriage, on one hand and Lady Gaga on the other. Harry is in a suit logically stating why there should be same-sex marriage. Lady G is dancing and singing in a bedazzled leotard about same-sex marriage. Which one would capture your attention?
Ancient Greece is no different. They would rather watch and learn from an entertaining play than listen to some guy in a stuffy toga.