It reaffirms the exorcism the priest did for us when we moved from paganism into the family of God. The Mass moves forward in the perfect prayer of deliverance from the Penitential Rite, where we close spiritual doors through confession and repentance. We move to the consecration of each person along with the bread and wine to become the Body of Christ. Use them for that conscious purpose. Many people have chosen not to fight because the conflict of kingdoms is always messy.
Scripture recalls that many of the demonic spirits came out with a shriek.
Nobody likes screaming. Things occasionally get unpleasant. The real choice is either to leave a person under the power of darkness, or set them free by the power of Jesus. It is significant that this statement comes immediately after a power encounter with satan at the temptation in the desert. Satan has stolen our joy and peace and the souls of many.