systemd (or rather Poettering) also isn't really a fan of dbus. That is why most new IPC APIs are using Varlink (and socket activation) instead of dbus. They've also been slowly migrating some of the internal IPC calls to Varlink instead.
Systemd probably is never getting rid of the dependency of dbus due to providing public APIs via it, but maybe it can be downgraded at some point to an optional dependency where APIs are registered if it is installed and just skipped if not.
True and he is right, but it's still a dependency on systemd, Varlink is some ways better, (giving much more control over listening and control over what receives messages) but the point still stands I don't want my init system to depend on this kind of userspace IPC mechanism or have to provide this, especially on systems I want to lock down.