I don’t think they want to change anything for non-systemd environments, but their solution not requiring SUID is just a nice little advantage.

Of course you can use the many systemd tools to replace a kludge of alternatives (just systemd vs dnsmasq+netplan+rsyslog+…) but most distros seem to selectively apply a few parts of systemd, and use their own preferred alternatives for the parts that systemd isn’t particularly great at.