The reasoning is simple: if someone thinks something would look bad on their resume, they probably don't want to spend time on it, either.
For example, I wouldn't want PHP or Fortran on my resume, and, consistently with that, I avoid them. I don't have an opportunity to actively avoid them, but that defense mechanism would leap into action, if called upon.
However, I know a thing or two about these; I'm not simply applying "meme-based reasoning".
