An actor does far more than read lines from a script. The work involves understanding the intent of the screenplay, syncing with directors and co-stars, and bringing emotion to life within the constraints of a set or stage. Even the same line has to be delivered differently depending on the other performer, camera position, and editing plan, so the job requires judgment that goes far beyond simple recitation.
AI is improving voice synthesis, face generation, and motion generation, but that is not enough to measure the real value of actors. Responding to changes on set, turning abstract directing notes into physical expression, and matching the emotional temperature of the whole work still rely heavily on people. That is why it is important to separate what is becoming easier to replace from what remains human at the core.