The “fully automated” factories have humans involved in QA, maintenance and engineering.

They often have to stop the factory and investigate and troubleshoot.

i mean youre most likely not wrong (i dont have insider knowledge of those places), however your previous comment said "never want it to be dark" - when the reality is that its normal operation _is_ dark. only when the automated QA detects issues or theyre doing random inspections are the lights turned up/on

this is an outdated video for waht was state of the art a few years ago https://www.youtube.com/watch?v=MCBdcNA_FsI

again, i dont have insider knowledge so i cannot speak on whats SOTA in chinese automated factories beyond whats covered publicly