>>/43790/
Also alias can be made easily, but the commands you mentioned were semi-traditional at this point. They could have implemented the stuff next to them, or made default aliases for them, or take them out, but giving an option when the systemctl poweroff runs on the first time which would offered to create an alias at that point for later use. Or whatever.
Ofc this is more of an annoyance, and practicing sysadmins (not many else needs to use command line frequently these days I assume) can step over it quick, but I can imagine some more assburger ones sperging out on such details - alienating them from the systemd project.