In reply to brianjcooper:
As I understand it (I assume people with better engineering knowledge will correct me if I'm wrong), you need the trigger wires on a cam to retract it -- not for it to hold. If the wires break, the problem will be that you can't remove it, not that it fails.
People rarely die from "stuck cam".
The only cases I can imagine would be the sort the OP comes up with, where not being able to retrieve a crucial cam meant not having it to use in a life-threatening situation.
On the other hand, I can imagine that if the trigger wire repair failed, someone might lose an expensive cam and ask for compensation for it. Even if the repair kit was sold with appropriate "use at your own risk, no guarantees" legal boilerplate, that would still have the potential to be stressful and upsetting to resolve.