Although I am suspicious about what you claim, I really have no basis to challenge your claim. I CAN tell you that I've known several HR friends over the years, including one who was a VP of HR for a major corporation. They tell me that over the last 30 to 40 years, they watched HR morph from basically a compliance organization (OSHA, EEO, etc.) into a "cost of labor management" organization.
I had to deal with HR weekly during my career, through several major changes. Their lack of honesty and openness was shocking. Through one very serious change to the healthcare which was going to cost employees with chronic conditions (or their dependents) literally thousands of dollars, as HR rolled it out, the HR reps consistently misrepresented the magnitude of the impact. During annual performance reviews, my reviews had to go through several layers of management, but HR had "veto power" over ratings and could change them. We were then coached to say that we agreed with the ratings, even if we did not.
The last couple of years, our division was in the process of increasing the size of the employee population by 50%. We were hiring like crazy. We had trouble meeting goals and objectives on hiring. The problem was that our offers were insufficient. HR consistently explained that they were having trouble finding qualified candidates. That was a lie I corrected multiple times. I explained many times that I had found, and made offers to 8 candidates in month. I got one acceptance. Every single time, the candidate explained that the offer was insufficient. Worse, I was losing our best people to competitors who WERE making sufficient offers. Yet HR repeated, every month, that the problem was finding sufficiently qualified candidates.
Today, HR is to the corporation, what unions used to be for the employees.
I'm glad you are apparently one of the good ones. You're one of the few. I'd bet you it's far more like the head of a Bar association said one time with tongue firmly planted in his cheek, "The problem is that 95% of the lawyers are giving the other 5% a bad name."