Huh, let's not do that. If I chose "Copy link", I'd expect an exact copy of the string, not a modified (cleaned) one. What next, an image editor where "Copy image" gives you an enhanced image where e.g. people in the background and imperfections on people's skin are removed?
The reality is that you're using the browser under a certain user profile. If you want to really separate your data from other users using your computer i would suggest icognito sessions or creating different user profiles. If you share your user profile (active user) you expose all this data (bookmarks, extensions, passwords).
Average people do not have the time, knowledge, or interest to do what you and Justin propose. Chrome is exposing what is arguably the very (very!) large majority of users who will never have the wherewithal to individually concoct an infosec strategy for their machines.
