But, I guess revolutions moved past the debit card issue as well, we now have ability to pay with our mobile phones.
Even on the verges of civilization people have smart phones that can download apps and can be used to pay for something.

You can use your phone app to withdraw cash from atm, you can use it to pay for taxi cab, you can use it to buy groceries, you can buy on cafe. Basically apps are now the new debit cards, credit card is still an issue but at least for debit now there are apps for it.

Hence, if any company wants to create a crypto debit card they are following the trends a bit behind and instead they should be focusing on getting an app made that will allow us to use our phones to pay with crypto while the receiver will take it as fiat instead of crypto, basically be a middleman.