LOL.. baloney... you ever been on a
DCL cruise? my guess is not...Otherwise you'd know how much paper is wasted everyday with all the crappy ads and flyers that show up on your SR promoting xyz diamond, jewelry store, artwork.. That's every day, every SR.. And then when there's a POC the next day, there's also flyers for the diamond stores available at Grand Cayman, Cozumel etc.
So, no, it's not about sustainability or the environment or covid. It's purely about $. No $ to be made on the navigators but much $ saved by not printing them.