does familysearch employ people who randomly adjust information
Not as far as I'm aware. If you see a change made by FamilySearch, it was almost certainly them transferring information from Legacy FamilySearch, which seems to have taken place from around 2012-2015. I've never seen a change made by them more recent than that.
I've only seen changes marked as made by "FamilySearch" more recent than ~2013 when there was a report of abuse and staff had to clean up the mess left behind.
In November 2022, there was also a data migration that affected some of the Life Sketch data in the Family Tree. So if you are seeing that date and that type of change, it was a computer process operated by FamilySearch.