DA's don't pick crimes to convict. They pick what cases to prosecute. And a DA has an ethical obligation to not prosecute a case he doesn't believe he can win. They don't decide to not prosecute a case because it is a specific crime. They decide based on the specifics of the case.
As you said before, probation and/or suspended sentence (which is usually part of the probation sentence) is not unusual. But that doesn't happen unless the DA prosecutes a case.
They pick what cases to prosecute that they have a high probability of convicting.
You seem to often get caught up with the forest from the trees......