It's also the type of gore that matters. Some of the worst stuff I've seen wasn't the worst because of the visuals, but because of the audio. Hearing people begging for their life while being executed surely would feel different to even a surgeon who might be used to digging around in people's bodies.

There are many common situations where professionals are helpless, like people that needs to clean up dead bodies after an accident.

Imagine if this becomes a specialized, remote job where one tele-operates the brain and blood scrubbing robot all workday long, accident, after accident after accident. I am sure they'd get PTSD too, airey, sometime it's just oil and coolant, but there's still a lot of body-tissue involved.

I'd really like to see more data on this. I really think (most) people would be desensitized and not become hyper sensitive to this content.

Another fascet to this is the moderators willfully agreed to review this content and had full autonomy to leave the job at any point.

I'm sure they consented to taking the job but is it informed consent? Can you really know what you will be exposed to? And unless unemployment insurance is given to quitters, autonomy to leave a job at any point is overestimated... Sure you can decide if you want to leave but how long it takes may not be in everyone's control if they first need to find another job.