I'm using this a platform for something I was thinking about, clear back on page 3ish, when I tagged in.I have not done an exhaustive study on what it takes to fire a rifle with the firing pin down, why would I, I have more than once had a firing pin drop when not expected or in ways unexpected while trying to figure out an issue, I've seen very minor stuff cause issues that would result in bigger problems with a live round. If you work on enough guns you'll see ones that you can't figure out how someone didn't die using it and others that look perfect in every way and still have issues.
Most of us have a trigger tuned for 2-3 pounds, and some way less. The safeties on our rifles are usually brought in to be crisp and clean as well. The margine our custom LR rigs are dialed for are far from stock, heck my Savage actions that are all tuned in are more delicate than stock, by far.
I don't take my Chevelle to the store very often but when I do, I don't want the cowl to open up and blow the tires.