Sure, but the issue is he didn't delete his data, he deleted a header with a key in it, that's it, just a few MB. He didn't delete hundreds of GB of chats or browsing history, he deleted a key to access it and that key isn't necessarily the only one that can access it. All the stuff they want can still be accessed just fine if another copy of the key exists.

To put it in protective, just opening a web browser or some other app can delete/alter more data than was deleted in this case.