Funny you should mention librarians. It is not uncommon for any role which is titled "librarian" to require a masters of library science / information science. Example job ad: https://workforcenow.adp.com/mascsr/default/mdf/recruitment/... *
Other roles are commonly called "Information Specialist" or assorted similar titles (example: https://workforcenow.adp.com/mascsr/default/mdf/recruitment/...).
* Picked this library at random. I'd imagine smaller cities are a bit more flexible here, but I'd still take an even money bet that anyone who is under 45 at any library at random with the formal title of "librarian" has a masters degree.
I would also add that if you follow the news in the us, it certainly seems like cops need far more training for dealing with these issues.
My mom ran a daycare that partnered with a women’s shelter. Some of the cases were just a person who need a few months to sort out their life and rebuild.
Other’s had deep emotional trauma, little means of supporting themselves independently (e.g. lacking a high school education) and needed help with navigating the criminal justice system (either as a victim or a defendant). These folks clearly need a social worker with deep expertise in multiple areas.
I should note that a lot of the work for open cases goes to (lower paid) case-aids, and certain things can be delegated to volunteers (e.g. I've provided transportation to school for kids who were placed in a foster house outside their school district).
This isn't "social worker" in the loose sense of someone in the community. These are health professionals who receive extensive training in mental and emotional conditions.
Source: My wife is currently in school to be an LCSW, and her focus is treating adults with severe mental health issues.