More like train HR to not make unrealistic barriers to getting people interviewed who can do the job
At the last place I worked, we had the most awesome HR manager I've ever seen. She was smart as hell, listened to what the managers were saying, and got the hell out of the way when it came to technical evaluations - she hired people she personally didn't like on the basis of the team's recommendations, and they turned out to be good for the company. She knew enough about what we did to know when a resume was mostly BS, and when she wasn't sure she came to us to ask. She also was truly interested in the employees' needs, and often would go out of her way to do stuff for the employees to make them feel appreciated. *Everyone* loved her, and she had a real gift for interacting with people.
Until...
...the company was bought out and hired a "VP of HR" to be her boss that thought she (the new VP) knew everything there was to know because of all of her certifications, and was more interested in making the C-level execs happy than what was actually best for the company. She dressed up as an ice queen for her first Halloween party at the company, and the universal opinion was, "wow, totally appropriate costume".
The awesome HR manager left about 18 months later (after having been with the company for 8 years), and from what I hear, morale and productivity hasn't ever been lower. The new VP made it quite clear that the employees are looked upon as replaceable cogs, and that they should be happy that management deigns to let them keep their jobs. My former co-workers have lamented the quality of interviews of late, simply because Ms. VP thinks she has all of the answers in regards to hiring, and doesn't pay much attention to what the team thinks now.