Who is claiming that if a bug fix fixed and not documented meticulously in JIRA it is as useless as if it was never fixed at all?

That's not my intent as the parent here, or the point I'm seeing or picking up from this thread. There's value in documenting in a system (Jira is one choice), but I know that I'm certainly able to see value in building a system and a process and then trusting that developers use them when appropriate and know when they are not adding value.