To be fair, palm print isn't widely used as biometric-based identification. So even if the data gets compromised, it probably isn't all that valuable.
Amazon claims palm prints are 99.9999% accurate, or as accurate as Face ID, vs 99.998% for Touch ID.
Having used Amazon One at Whole Foods, the enrollment process is tedious. It isn't something you want to do when you are holding up the long line. Once enrolled, it takes a bit of effort to scan your hand. But it is still far easier than launching Whole Foods app to scan the QR code and then using Apple Pay to complete the transaction.
I mainly enrolled in Amazon One as I often like to go shopping without a phone (only Apple Watch) and Whole Foods app is not available on Apple Watch.
It's kinda dumb that Amazon One isn't integrated into Whole Foods app though.