Rereading this thread really does make you wonder at times.
1) treat all guns as always loaded
2) never point a gun at anything you don’t want to destroy
Most safeties are simple trigger blocking safeties. They prevent the trigger from being pulled which in turn lets the sear fall, which in turn lets the firing pin fall.
Even with the safety on, a good hard blow on the rifle and especially firing pin will likely fire the gun. Even more so if the trigger has been adjusted for a light pull. Could easily see this happening as you slip on a slope with the rifle on your shoulder and back of the firing pin collides with a branch or rock etc.
A trigger / sear has a few thou of engagement. It doesn’t take much gunk to cause a malfunction. I once had grass seed cause my rifle to fire when I released the safety.
With most bolt action rifles as soon as you lift the bolt handle the firing pin is blocked. This is to prevent an out of battery firing.
I really don’t get the stick a round in the chamber as you leave the car mentality. How long does it actually take to chamber a cartridge - less than a second. If a beast does pop out get up on your sticks rack the bolt and shoot.
If you covering distance, going across rough ground etc etc keep the chamber empty. Perhaps you might loose an opportunity, but is the risk of shooting your shooting buddy or yourself worth it. And can you shoot a deer as climbing down a steep cliff or trying to cross a fence.
Lots of comments - “we never hear about accidents or negligent discharges”. - well there is at least very good AW on this thread who reports witnessing multiple NDs with candidates out stalking. I know other AWs who also can report such things. Indeed the time when my rifle went off as I released the safety was in front of an AW.
When ever you load, unload or take the safety off that muzzle must be pointing in a safe place. You do see videos of the safety being released as the rifle is pointing at a deer - this could result in a wounded animal. Release the safety with rifle pointing into the ground, then bring the sights onto the kill zone, then put your finger on the trigger.
So is a safety “safe” - NO - the gun is loaded and can still fire.