The Catholic Church takes the words of Jesus Christ in the 6th Book of John, literally. "This is my Body. This is my Blood". Perhaps your faith denomination does not interpret scripture literally.
Given that a priest (or bishop or cardinal or pope) is in the presence of Jesus Christ during the consecration of the Eucharist, attire, appropriate to the reverence that should be shown to our Lord, is the dictate. For this, we turn once again to scripture for an explanation and justification.
For your brother Aaron you will make sacred vestments to give dignity and magnificence. You will instruct all the skilled men, whom I have endowed with skill, to make Aaron's vestments for his consecration to my priesthood. These are the vestments which they must make: a pectoral, an ephod, a robe, an embroidered tunic, a turban, and a belt. They must make sacred vestments for your brother Aaron and his sons, for them to be priests in my service. They will use gold and violet material, red-purple and crimson, and finely woven linen.
Exodus 28:2
The rest of the chapter gives details on each garment.
Nothing in the New Testament requires abolition of priestly vestments. Our Lord attacked the Jewish leaders for a number of sins, but he never condemned their priestly garb. It's true the early Church didn't use the Old Testament vestments, but this is because Christians didn't want to identify their leaders with the Jewish priesthood.
“Given that a priest (or bishop or cardinal or pope) is in the presence of Jesus Christ during the consecration of the Eucharist, attire, appropriate to the reverence that should be shown to our Lord, is the dictate. For this, we turn once again to scripture for an explanation and justification.”
This is of course a false argument. Not required at the Last Supper. Not taught in the New Testament Scriptures - anywhere.
“For your brother Aaron you will make sacred vestments to give dignity and magnificence. You will instruct all the skilled men, whom I have endowed with skill, to make Aaron’s vestments for his consecration to my priesthood. These are the vestments which they must make: a pectoral, an ephod, a robe, an embroidered tunic, a turban, and a belt. They must make sacred vestments for your brother Aaron and his sons, for them to be priests in my service. They will use gold and violet material, red-purple and crimson, and finely woven linen. Exodus 28:2”
This is telling. The only passage seized upon to justify wearing costumes in the church is a passage related entirely to Israel - that God laid out in detail. And yet no such instruction from God exists in Holy Writ for the church. You are left with a pagan wish and reading backwards into scriptures about Israel.
“Nothing in the New Testament requires abolition of priestly vestments.”
This is another false argument that makes silence a justification for action - and this used to justify doing things as the pagans did and still do.
“Our Lord attacked the Jewish leaders for a number of sins, but he never condemned their priestly garb.”
Why would he? Again, using an argument that has nothing to do with the church to justify imitating religions.
“It’s true the early Church didn’t use the Old Testament vestments, but this is because Christians didn’t want to identify their leaders with the Jewish priesthood.”
This is simply an opinion without grounding.