Also Joselyn here is what journalism is according to Merrian-Webster:

Full Definition of journalism

1. 1 a : the collection and editing of news for presentation through the media b : the public press c : an academic study concerned with the collection and editing of news or the management of a news medium
2. 2 a : writing designed for publication in a newspaper or magazine 
   b : writing characterized by a direct presentation of facts or description of events without an attempt at interpretation
    c : writing designed to appeal to current popular taste or public interest

2 a and 2 c easily apply to The Mary Sue.