1. A journalist is trained in journalism
I'm a designer and I'm trained in design, but I would never define a designer as someone who is "trained in design".There are many ways to learn, and various paths to success. Traditional education is definitely not the only way. I know designers who aren't formally trained who are better designers than I ever will be.
I'm pretty sure the same thing can be said about journalists. We've all seen amateurs blow formally trained journalists out of the water, especially when reporting on highly specialized topics.
Besides, her only motivation for that statement is "a journalist requires specific training."
[edit: got gender of author wrong]