Not sure if that was sarcasm though.

Anyway, why do we need dbus if we can live
without it?

I've seen these [1] cool figures explaining what it is
but neither them,
nor the article didn't give me the answer why it is
necessary.

Mitt

Reference:
[1]: https://upload.wikimedia.org/wikipedia/commons/3/34/Processes_without_D-Bus.svg
https://upload.wikimedia.org/wikipedia/commons/6/6d/Processes_with_D-Bus.svg