What about Gretchen Carson: huffingtonpost.com/2009/12/09/jon-stewart-calls-out-gre_n_385158.html ? Do you think she's dumb too?
The truth is the world can be incredibly hostile to smart people, and it's particularly hostile to smart women... particularly in show business. It's a supremely smart woman with a very sharp, dark sense of satire who creates a persona like courtney love in response to that hostility.
Also, I know you probably think your doubts come from her drug use, but i'm pretty sure you only doubt her because she's a woman. Would you question Tom Waits if he put out that article? Do you often question the authorship of Salon articles? How carefully have you checked your sexism here?