Use of one bank's credit card is voluntary and not mandated by the central authority. It's the difference between choosing to only read the New York Times or a government enforcement of one source of news
Is it? I can't see living in Europe without an IBAN for instance -- and the card that comes with one. And that's not something the government is enforcing.
Same in the US, you can't not have a credit card because of the credit score system there. Use of a credit card is mandatory because you need it to financially "exist."
Living without a bank account ('IBAN') in the EU would be hard today. Living without a debit card is still doable, but becoming less and less practical. Living without a credit card is completely normal, many people do not own one, including me.
Same in the US, you can't not have a credit card because of the credit score system there. Use of a credit card is mandatory because you need it to financially "exist."