You are basing your argument upon the false premise of doing everything that systemd does. Several people, perhaps most notably the Uselessd Guy, set out to do

You are basing your argument upon the false premise of doing everything that systemd does. Several people, perhaps most notably the Uselessd Guy, set out to do only a subset. After all, one of the common critiques is that one really does not have to reinvent things like a resolving proxy DNS server and an NTP server in order to manage services. (A resolving proxy DNS server is one of the things that is notoriously easy to reinvent badly, moreover. The DNS is full of traps for implementors.)