The "dark" EV plants making cars aren't using any labour, let alone cheap labour.
There's also that thing that made China what it is today - the USofA using China for cheap labour and a place to outsource all the dirty parts of high consumption.
China's moved on, US perceptions haven't.
The perception gap is the assumption that cheap means dumb or low-quality.
Those dark EV plants were designed and built by engineers and technicians working 996 for cheap on an hourly basis.