What Does “Plot Reveals Character” Mean?

Here's the latest from Jami Gold, Paranormal Author :

As we’ve talked about before, some stories feature more of a plot, and some feature more about characters. Other stories mix-and-match those elements, such as being plot-driven but character-focused.

No matter what we write, however, the point of our stories usually rests more on our characters than our plots. In fact, we might have heard that the purpose of the plot is to reveal character.

For some, that might be a controversial statement...