Don't worry, these agencies seem to be appropriately paranoid. As an example: each intelligence worker gets three desktops PCs with various levels of security / airgapping.

The most paranoid use typewriters.

and burn, bury, and store the remains in the basement.

If they were truly paranoid, there would be a lot more they would do. I would call it naive, but then again, they are.

Why assume that's all they? This is just one example of reasonable paranoia I happen to know about. Most things they do are, unsurprisingly, secret.