What a wonderfull diversion...
... let's all argue about encryption done by proprietary systems to divert from the much more real thread of "metadata".
The contents of a phone call or a text message are relatively hard to process, and even simple measures like using code words can make the job much harder.
"Metadata" is much more valuable as it is easy to process by computers. You can easily find out the graphs of interaction and therefore find out social networks.