Exactly. Large cases often produce box after box of documents and frequently supply documents not related that were not requested. It is a game of burying them in paper because if there is a smoking gun (document that is critical to their side) they may not see it or when they find it, they have paid tens of thousands of dollars in legal fees for the attorneys to find it in the many boxes of documents.

Often times one litigant can starve the less funded litigant out. Successfully starving a litigant out results in favorable settlements for the offending litigant.