The modifications are for … accuracy.
Incorrect...the modifications make the gun lighter and make the muzzle velocity about 1/5 that of a regular .22
No one on earth would ever use a competitive biathlon rifle to hunt any prey because the round will just bounce off whatever you're shooting at.
So biathlon rifles are bought specifically for the purpose of participating in the baithlon, not personal or home defense, and not for hunting.
Pretending a biathlon rifle is a firearm is like pretending a fluorescent tube is a lightsaber....it's bad faith.