Hm, I'm not sure about that. I suspect autofocus motors are much more expensive to manufacture than mechanical lens throws. They're almost certainly more expensive to design. I don't know about other manufacturers, but recent sony lenses contain 4 autofocus motors, and they can snap autofocus in tens-to-hundreds of milliseconds depending on the distance. Where do they even put those motors in the lens housing?

Its probably a scale thing. Photography lenses make up for the design, engineering and manufacturing costs with scale. Everyone who takes photos needs lenses. But far fewer films are made, and cine lenses are often rented. So they really can't be manufacturing that many units in total. I suspect they don't manufacture cine lenses in high enough volume to justify the engineering costs of fitting complex microcontrollers and motors into the lens housing. And if the production can afford to hire a focus puller anyway, autofocus just isn't that valuable.