I don't think this is solely tied to car manufacturing automation. Even though Hyundai Motor Group is acquiring them, I would imagine they'd be well-positioned to commercialize general-purpose robotics and not just for car manufacturing, if Tesla is anything to go by.

I do think this might be tied to South Korea's demographics, by 2040 the working-age population is projected to decline 25% from 2020 and keep declining almost linearly until leveling out around 17M around 2065, a 50% drop total in < 50 years. I would think HMG / Hyundai sees a huge business opportunity or this might be a national-level political priority but I don't know the specifics.