The notion that "modern day games would be controversial" is very short-sighted. Sure it'll be controversial if you simplify modern day politics so much to the point that everything leftist is good. But if you actually develop thorough mechanics that model nowadays economics and politics in a more accurate way, you can strike a balance that will please both ends of the isle.
If you're conservative, go ahead be fiscally conservative, limit immigration etc... but it'll have its downsides. If you're liberal, go on a public spending spree if you wish, but it'll have its own consequences. Ideally a player can choose between liberal or conservative policies based on the situation of his country, like if it's better for my country to reduce public spending, I won't say "oh no i'm liberal irl, i'm not going to cut spending on social warfare". It's a game after all.
Even Victoria 2 managed to implement these concepts in a pretty balanced way that wasn't controversial or all. So what exactly will be controversial about modern day? If you're so easily offended by politics in a video game, maybe simply don't buy the game.
And mind you there are games that did this, Realpolitiks, Geopolitical Simulator 3, Supreme Ruler. And the complaints that I've seen about these games are not that they are controversial, but mostly about bugs, performance and lack of visual appeal.