Wargames, like a car, like a gun, are tools.
A Bn Cdr trained his soldiers at Ft. Polk's Taskforce 3 JANUS Simulation Center (war game) in the mid 90s, before they left on a real world mission. During training, mistakes were made, "simulated lives" lost.
Upon return, this Bn Cdr came back to the trainers and thanked them, stating that lessons learned in the simulation were part of the reason they had a successful, peaceful, no casualty (any side) mission.
I'm a civilian contractor, working with simulations. I speak officially for no one, but I want you to know that I believe I am continuing to serve my country (Army Ret.) in my role in simulations.