Yesterday, I edited the previously-closed question How influential was Dune in the creation of Star Wars? in order to make it less broad. Basically, I changed it from "what are examples of Star Wars being inspired by Dune?" to "what are examples of Star Wars being inspired by Dune confirmed by someone involved in the production of Star Wars?" In my opinion, this edit made the question actually answerable (and less opinion-based).
Today, moderator Rand al'Thor rolled back my edit with the comment:
Sorry, but I think your edit changes the scope of the question too much. Asking for similarities between the two works is very different from asking for which similarities Lucas has admitted (which, if he did steal a lot of ideas from Dune, are likely to be only the smaller ones). The former is seeking a detailed comparison of themes and tropes; the latter could be answered by anyone with a Google search
Was this rollback justified, given that the first version was closed and the edited version was reopened?
Update: The question has now been closed again, which I believe gives further evidence my edit was necessary.