My most talented coworker was a contractor that was hired on full time. He has repeatedly said he would never have made it through the hiring process. I think about that a lot.
Because it is bullshit. HR have no clue how to find good candidates, and whoever hired them to get a new hire had no idea what the new hire should be able to do and so just gave HR a few buzzwords to work with. But even if they had been given a good job description, they are basically muppets.