That’s a weird take. A system is better because it’s free?
I re-read your comment and I missed the fact that you said online buying, sorry about that.
One advantage of traditional CC over Bitcoin is buyer insurance against fraud. If someone gets a hold of your Bitcoin wallet, he can take out everything and you have no recourse.
If someone steal your credit card and make fraudulent purchases, the transactions will be cancelled and you won’t be left on the hook.