3D, you don't understand. If one person leaves everyone must leave it's how we show "community" after the "celebration of the communal meal". And of course as a "community" we must be able to get out of the church parking lot before our neighbor, even if it means cutting off our neighbor.
Plus our seperated brethern don't do it and we must not make them uncomfortable. We must water everything down until are "one" and to even think that this (as currently practiced) means "one of them" is both close-minded and hateful. As is the thought of bringing them all back to the fullness of truth which would also be triumphantism.
I'd continue but I fear I am out of sarcasm.
You're too young to remember this prayer. Even in the pre-Vatican II days, people were streaming out the doors while the priest dashed through the prayer.
If you want to start saying it, go right ahead.