Olympic shooting has nothing to do with shooting of any other kind. The guns are custom made. Unless you are speficially training for the Olympics you'll likely never handle such a "weapon". I think using these guns is the equivalent to a running being able to use spring blades. I am not a gun owner but it feels like a pointless sport as done.
No, that is not true, these are fundamentally single shot bolt action rifles. Maybe like a race bike to a normal street bike.
The additional precision and adjustability are no use to a normal shooter but they are not more complicated to handle.