Or try out braindead jobs like HR /s
Jibs aside, the key issue is that a lot of folks just seem to stop learning after a certain point, even if it's their chosen occupation since decades. And it's not just limited to the factory workers themselves - how many of us have met a stubborn doctor unwilling to try out a new treatment mode, or a senior banker too stubborn to learn basic Excel functions. While those folks enjoy secure jobs regardless of their proficiency in modern technology, the folks at the lower rungs of the manufacturing ladder don't. Even if they do have the desire to learn, learning anew today has become an onerous process in most fields.
We really have a Continuous Learning problem that has to be solved here - helping people reskill or deepskill easier, if they have the mentality to improve upon themselves.