What value stablecoins settle? Go to any supermarket in the world and you'll see people paying with Visa or Mastecard every single minute. But where are the stablecoin payments? I never encountered a business, even a small one, that accepts stablecoins.
My guess is that most of the activity on stablecoin network is speculative trading, especially by bots. If someone shut down stablecoins tomorrow, the world wouldn't notice. If someone shut down Visa tomorrow, that would be Armageddon.
There is some certain thing that what arguing but based on your own explanation you are right, based on your theory so what I want to let us know you that a stable coin have not been considered in any way for buying and Selling of goods and services, so those Mastecard and Visa card you listed can be issued from Bank why stable coin from Bank, so it is not possible for using a stablecoin for payment especially in a supermarket or any other place except that it is person that knows or demanded to trade with stablecoin