that's the beauty, you pick and choose. curently you can choose the standard Mail app, same thing here, i don't understand why you make it more complicated than it is1. So when you double-click and have chosen to use Bank A's app, every time you double-click Bank A's app launches to the payment page ready to pay by NFC. That sounds good, but when you want to use Bank B instead to pay, you can't double-click because it launches the wrong app. Apple Pay lets you choose from a wallet of cards. Defaulting to a particular app only gives you one option (unless you can install a "Samsung Pay" app that has the same functionality as Apple Pay, and then, why bother?).
Use Apple Pay as the standard function or SamsungPay as the standard function or Revolut perhaps?
Multiple banks in EU do payment without Visa or MasterCard. And theoretically banks could make a new payment system without MasterCard or Visa, but Apple locking the NFC chip makes it not worth the investment currently as it would just be clunky by using QR codes or Phone numbers as a medium.2. I was giving you the options. Either the bank's app invokes some smaller version of Apple Pay just for your bank card, or they pay directly. But they aren't paying directly anyway because your cards are all issued by a particular payment processor: Mastercard, VISA, Amex etc.
Swish (payment) - Wikipedia
we currently do both3. Apple Pay isn't a third-party app in the way you describe it. It's a built-in means of paying for things, and do you really think it would be in use if it weren't safe and secure? Would banks allow their customers' card details to be stored on their phone if they hadn't themselves approved the security? It passes a token to the merchant, not your actual card details. Do bank apps pass a token, or your actual card details when you pay via NFC? Your point about being able to do other things in your banking app is moot. Apple Pay isn't a banking app, it's a way of paying for things. Using Apple Pay does not negate your need to use the bank's app to look at transactions, cancel direct debits etc.
it uses tokens to login to your bank or payment systems.
BankID - Wikipedia
who knows, a difrent payment system not using cards but a kind of eID instead as shown above4. What innovation would there be when NFC is open to all? Would it change the way you pay for things on your phone? What do you need NFC for within your banking app? What would it allow you to do?
well, EU have told Mastercard and VISA that their payment terminals must be open to the competition and capped their fees. so it's already done.Items in stores won't become cheaper based on who you choose to pay with, so the fees are neither here nor there. In giving you a Mastercard a bank is already agreeing that Mastercard will take a small percentage of the transaction.
Also, no one seems to be telling Mastercard, Visa and Amex to open up their payment systems to all and sundry. Why not? Why can't I go into a store that doesn't accept Amex and buy stuff with my Amex card via their Mastercard link? Because the technologies are separate and have been developed through the investment of those companies' money over many years. Why shouldn't Apple be allowed to have their own payment processor?
visa and MasterCard is universal by force. And the reason why apple won't be allowed to have their own payment processor is because consumers lose 100% on it. It's better, it can be used everywhere.