In the same way that Gran Turismo places its focus on realistic physics and the visual appeal of luxury racing vehicles, is exactly the same way in which Arma focuses on its presentation as a military simulator.
Fans of the series already know that this is not a game set to compete against the likes of Call of Duty or Halo, and those expecting to play Arma in the hopes for an alternative to such games will be disappointed as it distinguishes itself into its own genre. The experience that it delivers lies in its factualness and purity to being a simulator.
Arma 3 is not about a strong single player campaign with an engaging story and dramatic cut sequences.