That sounds a whole lot like, "I got mine, screw the rest of you." What about newer cruisers who don't have their CC lanyards yet? Or cruisers moving up to a new Club tier that want the new lanyards? Or people who lost a lanyard or had it ruined by an evil washing machine or a kid or a cat? Or what about lanyards that have just degraded over time?
Maybe you don't use your lanyards, but I use mine on every cruise. My wife doesn't carry her purse around the ship and women's clothing doesn't tend to have many useful pockets, if any at all. Most swimwear doesn't have pockets, either. And what about kids?
Besides, I just like having the lanyards. It's part of "cruise attire" now since it's always been there.
I'm sure that the older Magic Bands would work just fine. The Magic Band+ is supposed to do neat things at WDW, but probably wouldn't do anything all that interesting on the ship unless they specifically plan for it.
They won't give us free Magic Bands, though. That would be even more expensive and wasteful than the lanyards. So, switching to Magic Bands (even the non-plus variety) will add to the overall cost of a cruise.