FUD, let me try to put you at ease a bit. I recently "detailed" my E9 for some fluff and buff. It is probably one of the most difficult pistols to disassemble that I've ever done. But, riddle pretty much spelled it out correctly regarding the safety aspect.
The cocking cam has two functions. The first part of the pull begins to retract the striker mechanism toward what would be "fully cocked". As this is near its release, the forward facing "hump" on the cam depresses the sriker safety, allowing the striker freedom to move forward.
If the first hump on the cam were to disintegrate, the striker would be stopped by its safety from moving foward. If the second(forward) hump were gone, the safety still could not be released. If the safety itself was totally gone, the striker is still held at bay by the upward poiting hump that engages the stiker. Such a catastrophic failure is unlikely.
IIRC, the OM says to check the striker safety like this: Holding the slide upside down, manually retract the striker "slightly" and ease it back forward, toward the breechface. If the stiker doesn't depress under force of gravity, the spring is doing its job. If the tip doesn't come through, then the body of the safety is still blocking the striker effectively.
FWIW, I would be more concerned about the newer style intertial firing pin system in the +&+ revolvers allowing for a discharge. Sorry if I was a tad long-winded in my explanation. Hope I helped.