The risk structure is different. When you make an investment in a company that turns out not to be successful, you wasted your money. If you persecute someone w

The risk structure is different. When you make an investment in a company that turns out not to be successful, you wasted your money. If you persecute someone who would never have murdered anyone, you may have done great and irreversible harm an innocent man. The rate at which it correctly classifies non-murderers is more important for this measure to be useful.