The lowered level to hosting is the issue though. It's one thing for Facebook Messenger to be unencrypted, Facebook is this whole big faceless company. A random Facebook employee has zero interest in my local gossip of who's sleeping with who because they have no idea who anybody even is. It's another thing to use Mastodon where the instance is run by your cousin Bob who knows who everyone involved is and would really like to read your DMs to get some juicy info to gossip about.