ARMA is great if you want to learn small unit tactics and the limitations of a combat soldier. It won’t actually help you learn how to be that soldier. You could learn to be a reasonably good pilot, at least in theory, just by using a simulator that’s advanced enough. You could spend a lifetime on ARMA without acquiring the ability to even properly unsafe and operate an M4.
But I do agree that ARMA is as close as it gets.