Problem solved as long as you're threat model doesn't include three letter agencies within in the US and you don't mind that a company you're supposed to trust. and which promotes themselves to people whose freedom and or lives are on the line, isn't honest with their users about the risks of using their service.

The very first line of their privacy policy reads: "Signal is designed to never collect or store any sensitive information." which is demonstrable false. They've ignored requests to update it. (https://community.signalusers.org/t/can-signal-please-update...) I don't think you need to be "paranoid" to suspect it's probably better not to use their software when your privacy/security is critical to safety of yourself or your loved ones.