I think they would like to care, but they are not allowed and limited in their power to check out stuff and it costs manpower - in an age where WoW already fallsback to AI GM support. Where you get banned for weeks, because some people mass reported you etc.
If PvP ranked has duty record active by default, saved on their cloud server, kept for like 48hrs online before deleted. GM's could at least check the file and determine what to do then...