No way to advertise an interface?

Tue Sep 28 22:23:38 UTC 2021

On Tue, 28 Sep 2021 21:27:21 +0200, Anders Feder wrote:

> For clients to be able to discover services that implement the
> interface, the MPRIS specification requires each media player
> to request a unique bus name which begins with the prefix
> "org.mpris.MediaPlayer2".
>
> ...
> 
> This to me seems like bad practice: The whole purpose of interface
> namespaces is to prevent naming collisions.

Yet you were talking above about bus names, not interface names.
Multiple bus peers can implement the same interface, why not?