Outside the US, third party payment apps are popular, since they often don't require a credit card. But since Apple refuses third parties access to the NFT hardware, those apps almost universally have to use QR payments. It works OK, because most payment terminals have a display with sufficient resolution for a QR code anyway.
In my home country of Smugistan, greatest country in world, banks unnecessary. Check-outs take money directly from brain waves using technology invented by Smugistanian super computers. Money is crypto backed generated from farts released by citizens of Smugistan. Also, farts smell like roses.
NFC payments with cards. Payments based on proximity. Payment requests over chat etc etc.
Please. By all means, get out there. And look around and be amazed by how inventive people are.
How cultural differences form technological preferences. How people in one country send eachother billions a year via Tikkie, in another country pay at all shops via their chat app. How unbanked in many places pay with SMS credit. Or how many people pay fast and easy with QR.
Your bubble isn't "the best for everyone" it's just one of many options. One that you and your peers probably prefer.
But this is exactly my point. Those apps exist, and are popular. But they can't use NFC because of Apple's limitations on hardware APIs. So, QR payments are popular.
All those apps would use NFC for many of those use cases if they could. Which brings us back to the start of this discussion: which use case has QR payment, but not NFC (and thus requiring a camera in addition to a NFC chip in a smart watch)? Answer: the huge (international) market of non-NFC payment/ticketing apps.
A trust box, for example. Or a simple donation option. The ticket (pay what you want) at my favorite punk gig in town. Etc.
In e.g. the Netherlands, the majority of payments go via a payment system iDeal¹. Its easy to start an ideal payment with a QR code. It's, by my knowledge, impossible to do so via NFC - other than via Apple Pay or Google Wallet.
Then, there are vast fleets of phones out there that don't even have NFC. I wouldn't be suprised if a majority of phones in use today don't have nfc chips on board.
And, a large section of the population won't switch on NFC even. For battery. For privacy, for fear etc. If not for scanning my glucose meter, I would've switched off NFC by default. I'm no tinfoil hat, but 30+ years of software development and hackery has kept me weary of such stuff.
While not disagreeing with what you said, such "grab a drink from the fridge" things are always in a monitored environment. There are no unlocked public fridges even hyper-high trust societies like Japan or Dubai.
No.
In baltics, northern EU you can encounter countryside unsupervised apples, tomatoes and even honey where you take it and put money a box. No camera.
Also, even with cameras, it is little help of I am a tourist.
In Switzerland, I was in such a store in a mountain village.
I visited there once - no point trying to find me if I stole something.