my family and friends are intractable

You're probably annoying + not my problem. You clearly aren't very knowledgable about this, so I doubt you would even be able to explain it to them. XMPP and Delta Chat are easier to set up. You're just arguing that laziness is a virtue.

Signal is how we survived ICE in Minneapolis

Serious "it was revealed to me in a dream" shit that most people would think was excessive if I made it up as a joking example of Signal defenders. Signal is funded by the US government and collects + leaks metadata. The US government uses metadata to target hacking of the device itself. Metadata is more valuable for surveillance than message content, it is used by police + intelligence to fabricate evidence of "terror networks" including teenagers in Chicago texting each other. Minneapolis drove out ICE because they had guns and physically planted themselves between the psychos and the people they wanted to terrorize. If they were stupid enough to use Signal (or encouraged by people like you) or bring their phones downtown, they will be mopped up before they can do anything useful. Fortunately for the feds, Americans barely even bother to walk around with signs.

The ability of these companies to operate centralized services in countries that serve gag orders should make things obvious, but fortunately you people have been trained by social media to require epistemological proof of wrongdoing.