sincere, non-trolling question: Why?
You clearly saw some value in the convenience. Smartphone and smartwatch NFC offers that convenience everywhere. Even setting up palm authentication feels like unnecessary work.
I like to go running with nothing on me besides a house key, and it's useful to be able to stop by Whole Foods after the run and buy a snack without a phone, watch, or wallet.
Convenience?
Set up once with the CC with rewards for groceries, hover hand 2 seconds, done.
Apple Pay in the phone or watch are super convenient as well, but they take just a tad bit more of time between selecting the menus in the touch screen for pay options, and then selecting the matching CC.
I save like 30s? Possibly. Is this tech overkill? Most likely.
I used it at Whole Foods cause it did my prime code and charged me at the same time without digging my phone out of my pocket but also my Whole Foods has bad reception so it’s annoying to use