A wise mentor once told me, when in public, also consider the question that they did not ask.
That is what I did.
Your job duties are those that are given you by your boss, the Pastor. Your next pastor may change, add, or remove those duties. Your job title is not universal across all parishes.
(More than a decade working for the Diocese or Parish here, thank you very much)
And those roles culminated come with a title. When one is planning, preparing and taking care of the facets of liturgy-they are a Liturgist. This happens because people are trained to do so. Priests hire music directors, not because they are not able do music but because they don’t wish to. I knew a priest who was an incredibly talented musician…like could sell tickets. He LOVED planning and preparing music for Mass. He LOVED directing the choir. He sat down with couples and figured out what music for their wedding and he sat with grieving families and planned music for funerals. So that church had no outside (volunteer or otherwise) Music director.
And I know a priest who did the parish’s finances because he was an accountant in another life. He, of course, always had the best auditors, transparency and he LOVED the whole aspect of handling money. Most priests lothe this task.
Priests can and do assign jobs. One priest I know has a spunky jack russel terrior. He pays one of the high school altar servers to go on a 3-mile jog. He is considered the “official parish dog walker”. Because when you do a job, it comes with a title.
To say “well you do XYZ job which entails ABC but we won’t call you an ABC because—reasons” is just some sort of weird adherence to the idea that everyone is equal. People should be acknowledged for what they do and that often comes up with a one-word description of their job.
If someone organizes the music, readings and sacramentals. If they ensure that the right antiphon is printed and ready for use, if they guide the priest on all things Liturgy, they are a Liturgist.
Of course, it’s at the discretion of the pastor. He could resume that role at any point. But he could also take on ANY role. Music minister, CCD teacher, director of religious education, director of youth ministires, finance chair…so to say “well it’s not universal” is just trying to ignore that there is such a role.