@xor which movies in particular?
@xor Incompatible systems? Or maybe to keep them from getting infected? The androids of Ghost in the Shell SAC interact with Section 9's computer network via keyboards. I assume so that this is that they don't get infected themselves. But it might just be lack of thot on writer's part or "cool" aesthetic.
@DNA I've always thought it's a combo of those last two. Kind of like when explosions in space make a sound: might not be "right" but it's what the viewers expect
@xor RIGHT!!!! What's expected rather than what might be more realistic.
@DNA the best might be WALL·E, which I'll concede wasn't shooting for verisimilitude.