The wider audience wants to be able to hand out their contact details at a bar and know they'll be able to block the person if they turn out to be a creep.

Or they want to be able to block their annoying ex, that crazy QAnon fan cousin etc etc.

This is a 100% must have feature, and yet it's treated like an optional feature.

There's so many features like this - it's like people using XMPP have never looked at how most people use messaging.