We used to have a "cash card" in Sweden in the 90's[0]. It flopped because nobody wants to keep manually re-filling it with value all the time. It's much more convenient to have a card that pulls from your bank account (either instantly via debit or monthly via credit). In the mass market, convenience always trumps privacy.

The places where a "cash card" have gained popularity have all been using the "backdoor" of public transit payments that are so ubiquitous they also get accepted by retail (e.g. Suica in Japan, Octopus in HK, EasyCard in Taiwan, etc)

[0] https://sv.wikipedia.org/wiki/Cash_(betalsystem) based on the Belgian Proton https://en.wikipedia.org/wiki/Proton_(debit_card)

Governments frown upon KYC-less digital purse cards. Gotta force everyone to share their national ID number to just open a bank account to keep out drug dealers, terrorists, or NSFW game peddlers.

Banks generally don't like disposable digital purse cards. They make money off fees and interest. If a product doesn't rope you into a customer "relationship" where you link your pay deposits or later might get a mortgage or car loan they can only make money off fees. Enjoy paying $5 to activate a $100 prepaid debit card!

Credit cards provide convenience and cash back benefits. Some might prefer to pay cash for everything for ultimate privacy, and that's fine. But credit cards are the compromise I make. I can still pay cash when I think it's appropriate for a given transaction.

Using Google or Apple Pay so I can tap my phone instead of my card gives me no extra benefit that I care about and complicates my ecosystem with another party.