When something gets taken to HR they likely have policies that kick-off automatically. I don't know the size of your organsiation, but adherence to these procedures will get checked in any audit of the HR department a medium+ size company does.
Hands are tied, wheels go in motion.
As another poster also said, this could very much be part of the toxin healing you described.
An aside: I recommend anyone reading this to keep a warm relationship with your HR; don't need to be friends but simply warm. As well as showing you're a colleague, wheels are oiled for when difficult or unexpected organisational problems arise and need to be solved down the line. Not suggesting this of the OP, but in these discussions it can often turn into 'us vs. them' which is absolutely wrong.