Fraud protection of credit cards is the root of modern e-commerce. In some ways, Visa and Mastercard are the privatized court systems of the internet. If I end up on a random, self-hosted ecommerce site and decide to make a purchase - what guarantee do I have that the item will show up or be as-described? If I bought something through a bank transfer, reversing that purchase would be incredibly difficult. And, suing…
Outside the US, credit cards are much less common outside the US. The alternative to credit cards isn't CoD, it's debit cards, which are connected directly to a bank account. Merchants love debit cards because they have near-zero transaction fees.
You don't need credit card for chargebacks, just strong consumer protection laws that permit the bank to claw the money back from the merchant.
As for fraud, I don't have any data, and I'm sure there's plenty, but we have had chip-and-PIN in Europe for decades, and for more than a decade cards have been protected with 3D Secure and similar types of mandatory 2FA, so having the card number is not enough to complete a transaction.
People seem more wary of accruing debt in Europe; it's easy to lose control over your personal finances with a credit card. But we have middlemen like Klarna now that offer credit-card-like payment deferral. Klarna appears as just another payment processor, but takes on all the risk, similar to a credit card company.
The only thing I miss from US credit cards are cash back rewards.