I'm an artist that drawing these stuffs for a few years.
I don't think it is that sick, I have seen weirder fetish that make no senses than guro horror stuffs going on here.
Because extreme violent or gore is what most people see as a bit taboo, it is consider sicker than some of those weird fetishes. (Like girl licking doorknob or girl stepping on gas pedal with high heel, that was my weirdest discovery and I don't understand it at all. There is even a dedicated DA group for that )

If you discover more fetishes, you'll kinda feel that guro is not that sick at all, we are afterall made of bloods and flesh, I feel that feeling hot seeing gore is quite normal, if you are kinda into science.