I agree with Guardian on the decocker being more of an afterthought. Remember, we're talking a pistol design introduced in 1975, an era 8 or ten years before semiautomatic pistols became common in police holsters. (Most cops carried .38 Special revolvers.)
As far back as 1847, with Colt's introduction of his first practical SA percussion revolver, manually decocking a hammer was a skill that anyone handling a firearm of any kind - handgun, shotgun, or rifle - learned and practiced as a necessary skill. Look at the Winchester model 94 (That's "1894") lever action rifle, for example. The cross bolt safety was an addition that was made in my lifetime. Prior to that, when in the woods after venison or a set of antlers, the hunter levered a round into the chamber, then carefully lowered the hammer on to the live round. Safety was between your ears, and if an accidental discharge occurred it was no big deal, because the muzzle was ALWAYS pointed in a safe direction.
It was really only when semiautomatics began to be ISSUED to non-gunny people - cops and soldiers - that administrators began to demand decockers.
I'm an old retired fart, and I carry a CZ 75 B every day in SA mode. When loading, I chamber a round, then point the gun into my clearing bucket (a Home Depot bucket of sand) and CAREFULLY lower the hammer to half cock. The clearing bucket is on the floor next to my gun safe.
It's more of a Millennial attitude, I think, that expects the manufacturer to make a product that protects them from themselves, rather than developing the skill to make safety their own responsibility.