I think the issue you then run into is imagine another human came, picked up the camera, and used it to take a picture of whatever. It'd be fairly self evident that that the photographer would own the copyright to that work, but in your take - it'd be the camera owner.

So you're more of trying to create a special rule where if the normal recipient of a copyright would be invalid, then it slides to the 'nearest' most appropriate individual, but that seems extremely fragile and difficult to define.