It is very phoney. And many other Christians have openly made fun of it to me.
It has a historical backing, Saint Justin Martyr writes about a kiss of peace prior to the Eucharist, but I feel like the historical nature was different, more or less it was very tightly woven Christian communities who probably knew each other well and it would show a sign of being in communion.
I have spoken about this with priests, and this is one of three many actually agree is not something that they personally like about the Mass. This along with Priests facing the people and also prayers for the faithful many times come off as repetitive and people just reply Lord Hear our Prayer without much sincerity.
My favorite time of year is when the flu is around and the bishop actually doesn’t allow it. The priest says The Lord be with you and reply And with your spirit, and it goes right to the Agnus Dei. To me it’s somewhat nothing more than an interruption of the mass. When we are supposed to be really grasping Christ truly present on the altar we instead are told to turn around and shake hands or in my case I usually bow a gesture, but yah besides family or friends you could leave Mass and an hour later see them and they wouldn’t even recognize you. It really is a part of mass that I notice many have differing opinions on. I believe in the EF the priest just says The Lord be with you and the servers reply and with your spirit, or in dialogue mass the church replies but I see very few of those. I believe only in solemn high mass which there is more than one priest do they do the actual sign of peace.
Yes I could do without it. However the church has the Spirit guiding it and I can’t question it. I have my opinion but that means nothing.