It might possibly make it easier. I even used iPhone 3G recordings of my 2yr old daughters voice as the core of the main sound design motif an entire horror film and I was blowing my own mind, especially when I heard what I did on a massive system in suround as I had mixed it on only two hours of sleep over the course of three days.
Sure, that's a slight bit narcisistic, but getting away with what I did is an amazing feat. At least to me it is.
The gore doesn't bother me at all, and having been a part of a sound design team and as a lead sound designer for a feature horror film I have to say it was one of the most liberating and satisfying moments for me in my entire sound design career so far.
I'm not sure what part of you can't separate reality from fiction (and you're not a lesser person for it, maybe I'm the messed up one), but even stuff as gory as Saw likely shouldn't bother you as much as it should seemingly present a challenge for you (at least that's the way I see it as an individual, but maybe I'm jaded). It's just a job (but I'm also a severe agnostic and less sensitive to such things, so who knows).
If it does bother you, I think you might have possibly chosen the wrong career (or at least the wrong sector of said career). Sure, I'm not necessarily qualified to be an arbiter of taste or the final word in what it is to be an icon in our career path, but opportunities like this are sometimes golden in our chosen careers. Typically for very good reasons as well. It generally allows us certain freedoms that are usually taken for granted.
Situations like this are typically lower in budget, but also allow a certain amount of freedom and experimentation that we as sound designers and back-end-budget creative types typically thrive on. They also end up being the very situations that we as extremely experimental individuals end up honing our skills on and allowing us to be able to get away with things we normally wouldn't be able to get away with. Which are usually the exact same things that allow us to learn how to respect and also push the boundaries of what we do.
You're likely not the only one with this particular sentiment though. Don't feel like you're missing out on something or anything. Don't chase after things you don't want. That's futile. There's no preset path we should all be following. You're likely better off working on cartoons/animation where you usually get to do "cleaner" work and don't typically have to deal with any overtly gruesome material and leaving the gore to people like myself and vice versa. Not sure though. I hope that's somehow food for thought for you man.
Here's to hoping you find what you want!
You don't have to work on horror films. You can indeed push your career in the direction you want it to go in. You just have to believe, not give up and just go after it.
- I hope that doesn't come off as condescending at all. I actually meant that from the heart.