This is for those, like me, that use usernames as display names and don't allow changes, except possibly via request. You'll have to go back in, allow viewing in the profile edit page, edit the profile, then turn it back off.
admin ahould always have access to edit profile questions in my opinion and not need turn it on and off for edit things like this
it can bee frustrating as admin not have this tools and if you have this edit tools everyone on you website have it to