I came across this early in my career in networking. I ended up having to support another technicians customer(we primarily managed our own workloads) and he did not use the tools(vault) we had to manage the network equipment credentials, so I always had to call him and ask him what the password is and why he doesn’t update it in the vault(it frequently changed) … After bothering him enough about it he said it was job security.
This was a 45k entry level job that he was years into. Why someone would want job security at the bottom part of the totem pole is beyond me, but that is where I mostly came across tribalistic tendencies(I worked in a lot of small/medium sized companies before getting a big break)
If I look up those people on LinkedIn, they’re exactly where they were or in another lateral position. They don’t tend to make it very far.