Explain the problem as you see it
I want a field to be visible until I've manually set it. The default is triage/inbox. Once I've set it, the field can be hidden.
Why is this a problem for you?
It's handy that a field can be visible or hidden depending on circumstances, but my use case doesn't allow for an option that doesn't require me to either hide it or show it by hand.
Suggest a solution
A new option for field visibility: hidden when value is not the default.