It didn't prepare them for the public (and, in many cases, it didn't prepare them at all). It prepared or gathered them to support the function it performs for the public, much of which, by law, includes preparing, gathering, and reviewing legally non-disclosable information. That's the mandate it has in law—so it is not at all “incompetence” that that is how it operates.

You may not like the law (given that elsewhere in the thread you have suggested it is literally equivalent to the institution of slavery, I assume that you do not), but it is not incompetent for government agencies to follow the law that actually exists rather than your individual preferences for what the law ought to be.