If you can be reimbursed, you can also be denied your funds. This happens in plenty of scenarios (a fun institutional example was Citibank recently). There are

If you can be reimbursed, you can also be denied your funds. This happens in plenty of scenarios (a fun institutional example was Citibank recently). There are different use cases where sometimes you would like being able to revert transactions and sometimes you don't want it to happen. The supply of money is most under control with BTC, to be clear. The price is now very volatile, but volatile up is way better than stable down to me.