In a typical editorial or communications department you need to keep track of both events and appointments (e.g. a press conference) and your story lists.
Often these lists are quite redundant. Example: When you cover a football match this is a) an event as well as b) a story.
In Desk-Net this football match is one single entry. There is no need to have redundant entries in your calendar and in your story lists.
Obviously you can enter stories that are not based on an event and you can keep track of events and appointments in your calendar that you do not cover. But in case an event leads to a story you just need to enter it once.