In fairness, I think part of an editor's job is to insert ideas into runs and make sure DC can continue to hold onto and develop its IPs. That might require requesting certain topics or characters to be written. It is a part of the job of being an editor, together with managing schedules (a huge thing), selecting and supporting creators, improving stories, and so on.
In a way, I think the issue here rests on two things. First is that editors think too much like fanfic solicitors—I want a story that involving X and Y that scratches itches A and B, and have the role to make it stick for everyone else. Second is that it seems that too often they have bad ideas or bad takes on the characters.
(Note that this isn't limited to comics editors. During the 50s it was well known among sf authors that you had a much better chance to get stuff published in Astounding if you wrote about psionics. Once John W Campbell quit as editor, that slant disappeared.)