EVE Fiction

Every time I look at a bigger ship I can't help but wonder, what would be done with all of those rooms? The Moros has hundreds and hundreds of windows around the outside of the hull and probably countless rooms inside the ship itself but it's like many rooms would you actually need for a ship? Seems like you would have so much room that you could rent out office space or low income housing. Does anyone had some insight as to why might all this space would be necessary or if there is some lore some where that explains the need for so much space?