A Boring Dystopia

I guarantee you recruits are trained in the nearest forest. There's edge cases where using a video game can be useful for testing new tactics with veterans. But recruits are looking for the basics. Like what does a platoon wedge look like in a forest versus the grass.

War games are really useful for officers trying to plan things. That way they don't need to pay for thousands of people to deploy to special training areas to figure stuff out. But even then it's open to misuse, like when Rumsfield decided light infantry was a dead concept.