automotive workers unions started around 1918 and became major political players in the 30s -- a fact that i'm sure is wholly unrelated to why there are so many un-automated tasks in that industry.
Libraries are typically either governed by a municipality's rules around employment and treatment of employees, or part of a school/etc where there are again additional guidelines about these things to be sensible and not leading people into unsafe behavior.
Wouldn’t that just be “ionized”?