We're not Jesus. Priest and Exorcists can act in Persona Christ, but we cannot not. That's another reason why "Deliverance" is a Prot thing, since the Prots emphasize that all believers are a "priesthood" and can command with "authority". That has bled over into Fr. Ripperger's thinking, but there's absolutely no Catholic Tradition about it. In fact, as I mentioned, Ratzinger, when head of "Holy Office" condemned lay involvement in exorcist-types of activities, so why wouldn't Fr. Ripperger obey and pull his book?
In addition to not being Jesus, the fact that your or I know the name of a demon means absolutely nothing, and does not give any power overthem. But what it does to is cause us to begin interracting with demons, and engaging in excessive and dangerous curiosity. We simply need pray to Our Lady, St. Joseph, St. Michael, our Guardian Angel ... THEY know the names of the demon(s), their identities, and it serves no purpose for US to know them, as if my knowledge causes "disinfection". That light is the best disinfectant is a misapplied metaphor.
There is an understanding of the priesthood of all believers in Catholicism. This is seen more easily in the fact that we believe a Husband is the Priest of his home (domestic church).
That is not to say that there aren't qualitative differences between that the the Sacerdotal Priesthood.
I am glad you brought up Father R. again and that this is a space where people can at least ask questions about his methods. Not in a sense of deprecating his priesthood, of being disrespectful, but in a sense of simple inquiry.
There are other trad forums where I have been banned, BANNED(!), for simply asking questions about some of his methods.