Comment by arjie
Oh the alternative isn't taking a credit card out of my wallet and all that. It's scanning my Amazon Prime QR code and then tapping my watch after selecting the credit card. But it isn't "hard" per-se, just mildly inconvenient, and yes it doesn't take much inconvenience for me to volunteer my biometrics. Clearly that isn't sufficiently common a position or they wouldn't be removing it so your surprise is likely quite common as well.
I find scanning QR codes at the POS hugely inconvenient compared to paying with my watch. The discount has to be substantial for me to ever scan them.
Retailer apps are often surprisingly (expectably?) bad at dealing with spotty/no connectivity, and even if they aren't, getting my phone out of my pocket, unlocking it, opening the right app, getting to the right screen in it (oh, did it just log me out?) etc. takes about 10x as long as arming my smartwatch in a convenient moment and tapping it once the terminal asks for it. It doesn't even require a free hand, since the range of mine is much better than that of passive contactless cards.