Why does that matter? Cops weren’t listening to those old face to face communications. That was practically impossible which is analogous to the technical impossibility of listening in on E2EE connections. Instead they were cracking cases in other ways (physical evidence, confidential sources, etc.)
The Catholic Church seems to think so, and they've got a notorious anti-Devil bias. It's useful to put forward arguments against things, even if you don't agree with them, because it helps to put into words why you don't agree with them.
