That makes sense really. I would imagine that new and different is good and that might be enough for some. I know this may come across as an over simplification but if you look at the whole deal as a sort of service instead of a threat to your relationship it becomes like any other service you seek. You'd always prefer the more skilled, properly equipped, hassle free, most reliable service you could find. When you apply that kind of thinking towards the person your wife would enjoy the most the same should apply.
The trick is either being into the kink deep enough or being mentally prepared to the best of your ability and still wanting it. Either way you still have to have faith in your wife to ward off difficult times that may arise (or at least that's what I think I would need). If those things were solid, and you're confident you and your wife are on the same page, then you'd be sorry if you didn't try it. Just my own personal take on it, nothing more.