Systemd's scope is increasing over time, most recently with handling system /home directories. Seems very possible that the ability to disable features in the future versions of systemd will be removed because they do not have the required integration into systemd's view of the world.
In any case it's the default behavior of systems that should be secure and systemd is the exact opposite of that.
It's not ideal when looking at the whole environment, but specifically for our services - we've got the choice.