I agree. I don't use the wikitree ID in the preview to copy, as much as I need it to verify what wikitree profile I am looking at. Most of us have multiple wikitree IDs open at the same time, sometimes with windows 'partially' on top of each other, so the 'right' side is not visible, so the menu line is also not visible. Not having the ID visible above the Biography or in the URL line, when we are in Edit Mode on a page, makes it much more difficult to know what profile we are looking at and working on. As seen in the comments, people use the ID in different ways, but not having it 'visually' is a problem.
As an example, comparing 2 profiles side by side when a merge is being considered, we cannot determine if the parents, spouse, and / or children are the same without the Wikitree ID being visible in the profile preview. There is no reason to do a 'copy' of the ID or the formatted ID and name when profiles are being compared.