I’m going to assume this is a good faith comment, but I encourage you to understand that Europe and the US are different places, with significantly different ecosystems.
I also encourage you to read about Chesterton’s Fence. Make sure you understand why something exists before you think about how to replace it, then maybe you won’t see Americans’ use of credit cards as “irrational,” but instead, reasonable under the circumstances that exist.
That said… the US did roll out FedNow (similar to SEPA) but because the US banking ecosystem is more fragmented, adoption takes a while.
Wire transfers here are expensive and don’t provide consumer benefits (cash back, credit options, consumer protections like fraud and chargeback, or merchant coupons). In your example, if an unscrupulous store pockets the credit card payment, the credit card / issuer will often reimburse your purchase. (This is a law in the US.)