Comment by pavlov

It's not about cultural difference but simply what's easier.

Action sequences are forgiving. There's lots of motion and shiny vfx to fudge things over. Rapid cuts mean each shot can be short enough that the inevitable accumulation of AI hallucinations from frame to frame doesn't get distracting. Sets can be generic: if you're generating robots attacking New York, the viewer isn't going to have time to track if the bodega on the corner is in every shot, or if the Chrysler Building switches place around town. Shots can be practically from different cities and nobody will notice.

Carrying over an actor's performance is the opposite. You want long shots and impeccable scene stability. You can't just throw some additive-blended particles on the actor's face to distract from its generation deficiencies, like you can do for the Marvel scenes.

Bytedance is a corporation looking for clout, not to help filmmakers. They're releasing a model that makes them look good, and action sequences do that.

It's a counterintuitive thing to viewers who have long been told that vfx is the most expensive kind of moviemaking. With gen AI, these somewhat convincing Marvel pastiches are trivial to produce, but a sitcom episode is utterly impossible.