Not sure why this is getting downvoted. Anecdotally this seems to be the case. In my personal experience, HR is only accountable to the executive level.
The more professional and actually strong/competent they are, the more measured and appropriate that example can be.
If they’re actually weak or incompetent, expect to be stabbed in the back instead of the front, and for it to be insane and disproportionate instead of rational and measured.