The judges keep releasing them so the cops have a job of constantly re arresting them. Then the judges get to have them in the courts again giving them job security. If they put them in jail for a long time the judges, cops, prosecutors, politicians, etc. would be out of work.
Which would be a good thing because then the cops and everyone else would respect the citizen again. They would see you on the street and say hi instead of looking at you as a criminal first.
I think you see matters much as I do. There is such a rush for lawyers of all kinds, competent of law and incompetent, to become judges that the system is overloaded with free loaders. To become a judge, local to fed, is a lifetime freebee dream come true.