VG -
Just curious - How many times have you personally seen, or have had, an accidental firing from operating a CZ 452 safety wrong?
The Brno predecessor ZKM 451 (basis) for the 452 was introduced in 1947 they have used the same safety system since then. So why do you suppose they changed it?
Could it be because the 457 is a completely different designed receiver that no longer lends itself to inexpensively manufacturing the bolt safety and in the interest of manufacturing expediency and simplicity they went with a trigger block safety?
A question -
How many lawsuits have you seen filed against CZ for defective trigger/safeties? Not as many as against a company affectionately known "Big Green" - Remington.
If you want to have "fears and depredations" concerning safeties there are firearms to be much more concerned about than the CZ's with their bolt locking safety.
By the way - being an internet bully does not give you the right to call people who disagree with you STUPID just because they have a different opinion. - that is called "Bullying" something you probably learned from being a cop - if you really ever were one.
drover
