> You could always write code to help doing those things direct from disk, but you know what you have just written if you do so? A database!

Yes, but that's my point. Why is this not a part of the standard library / typical package with very little friction with the rest of the code, instead of a separate program that the standard library / typical packages provide in an attempt to reduce the friction?

Or are you making the general point that databases already existed prior to the standard libraries etc, and this is just a case of interfacing with an existing technology instead of rebuilding from scratch?