The awfulness of war is driven home by the fact that the heroic rebels in Rogue One are almost entirely ordinary people, with relatively ordinary abilities, rather than members of a Force-capable elite. Lead heroine Jyn Erso and her cohorts talk about how the Force is with them. But, with one marginal exception, none of them actually have the ability to use it as Rey or Luke Skywalker can. That makes their suffering — and their successes — more poignant and real.  

Source: Rogue One and the Moral Costs of War | Foundation for Economic Education