Maybe you could ask them to get in contact so I can actually have some money in my life. Heh, that's a joke. But the truth is you can talk to anybody, especially people who actually are professionals in the sphere, and they'll tell you the exact same thing as what I'm saying. You're free to use whatever platform you want, but don't pretend to have superior security just because you don't trust the "mainstream" platform as if Signal is somehow mainstream.
Again, if somebody with the literal full force of the U.S. government against him is okay with using Signal, then I think you can use Signal.