I submit a honest answer to your question:
1. Cars are designed, manufactured, and sold with the intent of transporting people. Alternatively, they can occasionally be used in other applications (racing, or as a weapon).
2. Guns are designed, manufactured, and sold with the intent of killing living things. That a particular gun may never be used for that purpose has no bearing on the original intent of the device. Alternatively, they can occasionally be used in other applications (target shooting, or, I presume, to brandish at burglars or muggers {not a recommended activity, I've heard}).
[1] You don't appear to know a lot about guns.
[2] Approximately 99.98% of guns are never used in the commission of a crime... fewer still in the commission of murder. Most firearms are never used for anything BUT target shooting, hunting, etc.
There are many firearms that are purpose-built for target shooting and are not intended for any other purpose, and would make poor hunting or self-defense weapons. Olympic target pistols come to mind.
There are many firearms that are purpose-built for hunting, (yes including handguns like the TC contender), which would make poor general-combat or general-self-protection weapons. Deer rifles with 3 round magazines and scopes come to mind.
Glock makes (among other things) a class of pistols that are specifically tailored for competition shooting events, where concealability and stopping power are not issues and reduced-charge ammo is used to minimize recoil and re-targeting time... these would be less than suitable for self-defense.
Yes, Glock also makes pistols that are specifically designed for police, military and self-defense uses.
But they don't make them with intent to use in murder.
Incidently, "brandishing" is a term that usually indicates unlawful and negligent display in a manner causing bystanders to fear for their safety. Pointing a gun at a mugger is a different thing, and quite commonly results in the mugger running away with no shots fired. (see Kleck study.)