Tool steel is commonly hard stuff
I think when you're doing a drop test, whether they make sense or not, anything can happen to any part. Firing pin blocks were invented because the market demanded them at some point. It follows that the market wants to see the results of design changes.
I'd still like to understand what broke on the CZ75. It was still safe, and it still functioned, but it was a disappointment nonetheless.
Stonebridge Gun Works says that the OEM P10 firing pin is significantly harder (RC 70, I THINK) than S7 Tool Steel (RC 55ish).
Not sure if this is true, and, if it is, I'm not sure if it's true for hammers and/or sears. Granted, the CGW parts are heat treated. Also, if it's true, I'm not sure if it matters. Maybe it only mayyer with regard to the wear of the portion that engages the trigger.
Regarding 1911s, my understanding is that Dan Wesson uses a lighter firing pin along with a heavier spring. It should decrease the already minimal risk.