Usually, there's a primary reason and a bunch of minor reasons. I'm not sure if minimizing crowds or even practicing social distancing was ever a thing on Celebrity. Was on the 5th Edge sailing and someone asked Capt Kate why is half the MDR closed because we were sitting on top of each other she answered Celebrity didn't go the social distant route
X did nothing to prevent crowding anywhere else on that sailing as it was alive and well during the Capt jewelry collection reveal, free jewelry gift, liquor tasting, art auctions, casino, the late night sky lounge DJ encouraged dancing with strangers, lines to get off and on the ship/guest service/restaurants, etc