When systemd is not running you cannot query with a simple command if apache will or will not be started by systemd. This will be useful for diagnoses on currently not running cgroup contained version. So yes something like systemctl but for offline systemd. If you could query if a service would be started by systemd there is no reason why sys v like init system could not reference this. So providing some compatibility to other systems that don't run and cannot run systemd. Also could make administrators life simple turn on service in one place and its on everywhere.
See also https://bugs.freedesktop.org/show_bug.cgi?id=60398.
Fixed in http://cgit.freedesktop.org/systemd/systemd/commit/?id=be394c48a7cb. (Note: --root=/ should also work.)
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