"Often" isn't a guarantee.

Turning "often" into "always" is the reason bitcoin exists, and the reason it uses so much energy.

Imagine that you accepted the Bitcoin transfer to sell somebody’s car for them to a known interested buyer, acting as a quick middleman, but then refused or failed to arrange the sale. There is still room to argue about what exactly the “trade” was and whether it was theft. The Bitcoin doesnt simplify resolving it. There were companies filling offices with people to do this exact “scam” years ago in Canada and I never heard of anyone getting punished because there were no contracts or bills of sale to refer to. Having a record of payment (via credit card) didn’t help anyone