Sometimes you need to search for text strings or other parameter values outside of Revit. For this purpose users need to manually copy whatever information the properties window provides. This is tedious and error prone - especially if the value in question is something cryptic like an IfcGUID.
I propose to allow to mark and Ctrl+C whatever is visible. Whether the selection is editable or not should not matter.
Tested on Revit 2023 and this is not possible.