We've had a billion discussions on Hacker News about payment rails and it's invariably always a European incredulous that Americans can't/won't do a digital payment instantly and for pennies. These Europeans are typically operating with a mental model where they have cash in a bank account and every transaction gets funded from cash on hand.
Americans - for better or for worse - want longer cycles to pay for their charges and many want rewards for their spend. I don't think it's uncharitable to describe those who pull out debit over credit during a transaction as lower income and higher credit risk than those who prefer credit. (Europeans will decry that this is Americans living beyond their means. Maybe! Maybe.)
But when it comes to business, I've never understood this argument from Europeans. Invoicing works on net-30/60/90 terms. In B2B payments you could reduce payment cost by doing invoicing with instant low-cost payment in 30 days, but incur a different "cost" in cash flow management. Credit card payments are a risk-based financial product that does a magic trick of arbitrage for merchants between a service/good sold and payment received as a net-30 invoice to the cardholder, and you should expect to pay a fee for that. An economy where businesses need to pay each other immediately out of cash-on-hand is less dynamic and less efficient than one where all that cash flow can get smoothed out via payment intermediaries. (Money you have to keep on hand for bills is not being deployed doing other things in the economy - this is inefficient!)
For C2B payments, this is probably a helpful and lower-cost innovation over debit rails. But credit is a different product, financially and culturally, in the United States.