Let me start by saying that you are right. Cash = cost factor. A card (in whatever way) is more convenient, and most likely cheaper than cash for all (many) involved.
But when you mention ApplePay, I just have to ask, why? Why do you need a 3rd or 4th payment processor in between you, your purchase and the merchant? The following is not personally directed at you, it's just the explanation for my way of thinking about the overall issue.
When I was a young boy, my parent's CCs were still imprinted when they used them. Back then, it was the CreditCard company that would issue your monthly statement and collect it - mostly - via direct debit. In many cases the merchant would collect the money directly from that CC-company. Your bank only knew the amount of the monthly statement.
That started to change when they went electronic. Now suddenly most merchants had a payment processor in between, to process all the different cards conveniently from one terminal.
Later the actual CC-companies (mostly) went away, and only their names were used, on cards issued to you by your bank. Now, your bank suddenly knew all of your purchases made with that CC. And the payment processor knew as well.
Nowadays, you're bringing in another additional payment processor. So, your bank/cc-issuer know what you buy, the payment processor chosen by the merchant knows what you buy, and the processor you chose to use your cards with know what you buy. And none of them do this "for free". Someone pays for this - one way or the other.
I ask: Why does Apple/Google need to have this kind of information? Why does PayPal need to have this kind of information? (I rarely use PayPal, I think the last purchase using PayPal or PayPal+ was more than a year ago ...) Why do merchants basically "tell me straight to my face": We don't trust you. If you want to be billed after delivery, another payment processor (PayPal+, Klarna, ...) has to vouch for you? I'm not giving in as long as there are different options, even if less convenient or more costly.
This might sound like I'm running around with a hat made from aluminum foil. But this stuff really moves me. I have cards, I have paid to PayPal+/Klarna, I have a card associated with ApplePay ... But I simply don't see any real need for it.
I've imported stuff, paid for with a credit card by simply giving the # over the phone or by fax, before anyone on eBay knew what international shipping was and way before customs understood how impacted they will be by international b2c or private sales one day (today). I understand that the way we do it today is more convenient. But I'm really worrying about all the information we give up to multiple companies for a single purchase. And have been, longer than some think it's woke to talk about data protection/ privacy.
(Especially, but not solely, because I'm European/German and "I" give up all this data mainly to US companies. Simply because our leaders failed to see what
Amazon, eBay, PayPal, (...) would become eventually. For that matter, we haven't purchased anything at
Amazon for over 3 years now.)
That's why I will continue to use cash as long as somehow possible.
Kind regards,
Oliver