We don’t have a way to make the followed by and assigned by filters connect to the user viewing the filters.

You can say it’s easy for a user to change it themselves, but when you many managers in an location with access to everything and some not as tech savvy as others, it’s much easier to have one Smart List that you can share with the other managers that will just automatically work for them rather than them having to create this filter (and any other additional filters we might have added to it) and save it as a completely new Smart list to themselves