I hate replying to ACs, but...
There is another and more logical reason for the army to have it's soldiers practice shooting at targets and that is to become better at hitting their targets. I'm guessing that is why it is called "target practice" and not "desensitisation drill".
Frankly the idea that violent people like violent things makes a lot more sense than being brain washed by computer games.
Here is my "Asinine comparison". Opening umbrellas causes rain as there is a strong correlation between rain and the people opening their umbrellas. Well, maybe I can not prove it "causes" rain but I think I can get away with saying that it is a contributing factor.