She overestimates the bad recruiters. Recruiters have been known to advertise non-existent positions so they can build up their folios. They have been known to alter resumes to make it look like the candidate is a fit when they aren't. They have been known to lie about candidates. They have been known to try to make the candidates do all the work. They have been known to take jobs posted by companies that do want recruiters involved and then repost them (it makes them look better having these jobs on their books).
My biggest grievance is them having put in zero effort to check if I am a match for the company or the company for me, despite the means to do so being readily available. ie they are wasting the time of everyone involved.
More personal context http://news.ycombinator.com/item?id=3661261