@Altair You have multiple other legitimate cryptographic marvels you could be using to protect yourselves. VeilidChat and Cwtch are the two strongest. Signal is still far better than SimpleX in all ways that actually matter, but if you're opposed to it, use one of the two that's actually legit.
SimpleX is a fucking honeypot run by nazis. Eventually the client is going to ship malware. If it isn't already. It's going to have intentional "bugs" that compromise your privacy.
There is utterly no reason to defend using it as self-preservation.