That depends. DCS's, Ready Or Not, and a slew of other ultra-realistic games show that you can have plenty of fun with high realism.

Now, in fairness, it might not be fun to you, which is valid depending on how wide you want the consumer base to be.

I doubt this games going to do that anyway.

I don't want to have to play as a faction only to have it fucked over due to some silly historian autist taking the game way too seriously and demanding it be done a certain way.

I don't think this has every really happened. Either the game developers were autists, or they weren't.