You're forgetting that most people go along with whatever the prevailing opinions of their tribe happens to be. This includes the vast majority of artistic types who, despite being stereotyped as freethinkers, are anything but. And if they do have any dissenting thoughts, they keep it to themselves, and the weak-minded among them will even gaslight themselves into thinking that they changed their minds organically.

Solitary confinement will make almost anyone go insane, and in an extremely repressive political environment, the part of your brain that's capable of independent thought will be isolated from engagement with your peers, and many people will simply break down and delude themselves into thinking they conformed out of a sincere change of opinion rather than coercion. Plus, no one wants to believe that their in-group are actually the side of evil, and since game devs tend to be weird nerds (not that there's anything wrong with that!), in an industry that's extremely demanding, their workplace becomes a surrogate family.

Remember, plenty of Germans went from being committed Nazis ready to lay down their lives for the Reich to becoming either diehard communists or liberals, depending on whether the Americans/Brits or Soviets happens to be the ones "liberating" them. Many former Gestapo agents even went on to become Stasi agents. Brainwashing works, "re-education" works, most people just aren't cut out to be political thinkers.