The articles of confederation almost single handedly drove the US back into being colonized by Great Britain by causing the states to be completely divided and separate. The states couldnt even create a standing military under the A.O.C. And if we tried to stick it out we all would have died when the war of 1812 came along
Even though the documents didn't exactly help the new USA, the Land Ordinance of 1785 and the Northwest Ordinance helped to create the states as we know them now. The Articles of Confederation didn't help much, it set a precedent for the US. Without this enormous failure, we probably wouldn't be the way we are today.
Well since before this was made into an important document they wouldn't have made this if they didn't think this would be helpful to our society and would you really make an important document if it wasn't important or wouldn't make a change in this world be serious now? So yes they were needed!