If Dutch intelligence is failing to encrypt their data to the point that AWS / the US government could see it then they deserve to lose every byte of it.
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.