In the traditional Mass neither the priest and cross bearer ever “passed by”. The priest came out from the sacristy and walked the few steps to the altar and everyone stood up. The procession down the aisle with the cross bearer, deacons, concelebrants, acolytes, altar servers, readers, extraordinary ministers is new. The priest used to be the only person who would bring Communion to the sick. He would carry it to the hospital or home. The act of reverence was made to the Eucharist he was carrying. When you met him in the grocery store or on the golf course it was different. If we want to continue the custom we should bow to the lay people who carry the Eucharist to the hospital, but no one would be able to know them in street clothes.