I think in our domain (software), there may be some additional rational to keeping things secret. An unpolished early revision of code may be a much better way to judge a job applicant than a resume. No one would consider publishing the rough draft of their resume.

The appropriate counter argument (IMHO), is that "unpolished" is different than "poorly written", and you generally don't want to work with managers that can't comprehend and appreciate the difference.