I meant that setting up a mechanism to separate something from the main body of the satellite shouldn't be as difficult as the the rocket and all those other systems. I fully understand the fact that problems can occur when you have so many variables and forces acting on a piece of machinery. I've had to do enough studies on that to appreciate how those malfunctions can seemingly magically occur. I guess I was just pointing out the irony of one of the less complex parts of the process causing the failure.
The workings of a rocket are fairly simple in theory. But making one work in the real world and have it work in a precise and controllable manner is much harder.