The issue here is branding, not engineering or design. Systemd is an umbrella under which many key userspace tools are being developed. The actual init system

The issue here is branding, not engineering or design. Systemd is an umbrella under which many key userspace tools are being developed. The actual init system itself is a lot bigger than the old SysV Init system was, but it is separate than all these other things that also say Systemd on them. The best analogy is GNU. You don't complain that GNU contains a compiler, and also a text editor, and also C System Library do you? GNU is a project that develops a load of components that play well with each other. Systemd is the same.