Not only is HR incentivized to defend the company over its employees whenever possible, but I think it's a position that attracts psychopaths. Being in HR takes no extraordinary talent whatsoever, yet HR has massive power over the destiny of individuals. They get to decide whether you have a chance at landing a job you want, make your rent next month, whether a coworker who bullies you gets to keep their job, and so forth. There's good HR people out there, but I've seen a substantial number of dumb, ego-tripping, completely unhelpful HR people as well. If you've got nothing going for you and you have an inferiority complex then HR is for you because you can take out your frustration by deleting resumes that use present participle instead of past participle.