You are wrong, in many cases the customer has no recourse for credit card fraud: https://news.ycombinator.com/item?id=8918865 People think credit card anti-fraud measures are perfect. They are not.
You CAN and SHOULD use the legal tools at your disposition (lawsuit, small claim court, FTC/BBB complaints...) if you get scammed after paying in bitcoins. You definitively have a chance of recourse. These tools work, that's why we have them.
For example the U.S. Securities Exchange Commission successfully prosecuted Trendon Shavers (he was running his scam denominated in bitcoins).