What I'm saying is that the percentage of criminals who are actually punished has very little practical effect. It doesn't affect deterrence because the other prospective criminals never know about it either way. It won't make any particular criminal's victims whole either way (if anything it makes it worse by reducing their ability to pay restitution). It doesn't reduce recidivism.

It's not that we shouldn't try to do it. It's that failure is mostly irrelevant.