[ For avoidance of doubt: I don't think there's any particular significance to the specific question and edit I've linked to here. It's not intended as criticism of the actions of any one person at all; this has been on my mind for a while and these were just the ones I saw which kicked me into writing a meta post ]
We not uncommonly see questions which have the relevant image linked to an external source (see for example How to show great heights and depths without the road dividing the picture into two halves?). Every now and then, an edit is suggested to the question which embeds the external image into the question (for example, this edit). Should this kind of edit be rejected?