there is the fact that within just a few hundred years people were talking about it (through writings) in a way that seems it had been passed down orally. if you use archetypes, then the scripture points to a queen mother who sits with her son on the throne. also, catholics equate the ark with Mary, and Jewish tradition says that the ark was taken into heaven.
you should try reading “Hail, Holy Queen” by Scott Hahn. he is a former Presbyterian minister who is now a leading catholic apologist. again, i am not catholic, but we have to understand that their doctrines aren’t just made up out of thin air.