And if you don't arrest them, not only will they commit crimes, but a new batch of criminals will also commit crimes. This is not a question of enforcement or prevention, this is a question of doing both.
That's another way of saying about the same thing. Which, again, is intuitive and sounds correct. But again, most studies I've seen of this show no or only a very weak link between enforcement and crime rates. Except those issued by the police themselves. Where have you gotten this information?