Not entirely true. As an editor you generate ideas, guide journalists and even edit articles and features yourself if you want it down your way. In order to do that you have to come from a journalistic background with experience in writing for a magazine. So as in editor you are most definitely involved in the actual writing, especially if you don't have a team of top journalists.
Further more editors do occasionally write as well. Obviously an editor in chief is mostly involved in overlooking the magazine as a whole making the more crucial decisions, the junior editors have their hands full making sure things are done on time and sometimes even staying after hours helping their journalists. This is how it works in the real world unlike at the top where a highly paid editor just attends fashion shows and is not too involved with creating content for the magazine. Decent writing skills and good understanding of how content is built up is a must.
