Edited my response to be less sarcastic. But honestly it’s hard for me to read something like this and believe you aren’t being deliberately misleading.

All this stuff is only stored in an encrypted form that signal never has the keys for.

And all this stuff is only applicable if you choose to set it.

Yes, for Alice to see Bobs profile Alice has to download some bytes. Those bytes live somewhere.

The difference is that, unlike every other app, signal spent a ton of time making this work in a way that The signal service can’t read your data, even if they wanted to.