How secure is Clarify.fm with content and recordings?

Looking over Clarity.fm's TOS and Privacy, I couldn't see any notes regarding the calls. What's the security with all calls and its data stream? I didn't read EVERYTHING in detail for the TOS and PP, but I'm guessing all conversations all not really private if Clarity.fm routes all voice through their servers? I mean, nothing within the US is not really "secure" at all with the amount of wild laws, breaches, disasters around "holes" in the system for various big well known companies. Clarity.fm clearly states in the TOS that ALL content should be run through their system, and that no sharing of other mediums is allow, simply to keep users "safe". I'm pretty sure I would rather pick Telegram for secure messaging and voice than…