It’s not meant to be a messenger, it’s not meant for privacy. Everything being public and transparent is part of the core design of the Fediverse. The idea of private groups/posts on the Fediverse seems counterintuitive to me.
Just want to counter this: Privacy is in fact a part of ActivityPub. Stuff is only meant to be public if it is sent to the Public collection, otherwise it should only be delivered to the intended recipients, much like email. This is part of the core protocol, not any extension.
This community does not exist on lemmy.ml (probably banned), so I don’t believe they will see your mention here.