1) The author will not get the country's history, complexities, how they interact with their neighbors, etc. It is all projection and not true to reality, it requires "suspension of disbelief." Furthermore even if you make it super accurate it will thus force the nerds who actually know more to become disillusion for the "uncanny valley effect" is evident like fake CG animation that looks real but isn't makes us feel creepy. Thus countries are never real and pure projection, and when they get close to real there not realness become even more evident.

2) People think you are trying to change their politics even if you are not [and many authors are specifically trying to change your politics.] Thus the reader is not enjoying the story but is instead being vigilant to try not to be manipulated. The absence / presence of storytelling is all messed up for we are talking about real countries, as in reality, even though this is fiction.

Thus often "horror" and "fantasy / sci-fi" does the same purpose and can do a better examination of themes and cause people to think and dream. Once we accept this is not reality at the onset, we can examine things with fresh eyes for it is low stakes and we do not feel like we are going to betray our real concrete reality. We do not feel like we are going to be manipulated via 1 and 2 I mentioned earlier.

Shrug...that is a storytelling reality, we must learn to deal with it.