I guess it's more that... Well, we take down our opponents, sure. But it's quieter than that. Most of the time they kill themselves for us. We can't draw attention from authorities after all. But dropping someone out of an airlock seems a bit flashy. It would be hard to ignore things like that.

It might be the same result in the end, but execution is everything. Then again it sounds like public execution is what gets people going in your time, so, different cultures and all.