Re: More honest questions
Probably because it wasn't intended to be an actual fork but rather a demonstration on just how tightly integrated the systemd components are. Sort of a, "Oh, you say it's so simple?" response to claims that you can separate the components.
As I've mentioned, the desire to have this kind of integration appears to come from up top, meaning any attempt to divorce the init part of systemd from the rest is unlikely and it would make more sense to start from scratch. Trouble is, something as serious as an init replacement, especially for modern environments, will likely need some backing, and most commercial interests that back Linux projects are backing systemd.