Everyone that bans the swastika hates White people. It is the single most significant aspect of politics to them, so even when a swastika can in no conceivable way be linked to the 3rd Reich, it still must be totally eliminated.
The "fun" propaganda is more insidious and effective. Baldur's Gate 3 and KCD 2 should be more concerning to us because they are good games and also function as subtle (and sometimes not so subtle) brainwashing. Propaganda is more effective when you enjoy consuming the propaganda.
You do have a point. No matter how rational we are or how much we tell ourselves something is "just a movie" or "just a game," humans can't help but consume it as if it were an experience we actually lived through. This is why it's so insidious that they want to "diversify" media depicting actual historic events, and why they put such an emphasis on portraying leftist mindrot in every aspect of media imaginable.
There will probably always be an audience for realism in games. In terms of your question about it incepting new thoughts or causing mental scarring, it will depend on how good the game is. I don't think most adults would be traumatized by in-game violence for example, but I do think people of all ages might be susceptible to some level of mental plisoning from the inclusion of certain elements. The best propaganda pieces are good art, games, movies, etc. If you enjoy the propaganda and seek it out to consume it, that makes it more effective. Baldur's Gate 3 and Kingdom Come Deliverance 2 are examples of good games with leftist propaganda that accomplish this.
Remember when Vavra said there were no blacks in medieval Bohemia?
Hopefully more people like their stance on homosexuality and dark skinned people too.