If the camera is there to catch you, then it's good and you have no right or reason to expect privacy.
But if it's about catching them, uh-oh!
I wear a GoPro at training events, but would never wear one on an actual incident. We often show up in someone's most vulnerable moment. We're there to provide care and compassion. Making a video recording of someone who is sick or injured is neither necessary for their care, or compassionate.
A crash site is a hugely complex and chaotic event; wouldn't it make sense to have more data and awareness if that's what cameras can provide? Helmet cams, truck cams could all provide additional data for investigators.
Just because there are good reasons for banning them doesn't mean the reasons for banning them in this particular case are good.
Everyone involved in this blatant attempt at covering up, not only this error, but all future errors, should immediately lose their job, including ALL (bloated) pension benefits.