What do you think a relational database does to provide you the querying flexibility? It builds the same exact data structures, but does it automatically and dy

What do you think a relational database does to provide you the querying flexibility? It builds the same exact data structures, but does it automatically and dynamically, while offering much more usability. Most attempts to query using raw data structures just means you end up rebuilding a (very poor) relational database with none of the features.