The correct answer is: this is actually determined by the position of "truth and justice". Because the position of "truth and justice" is not at the "two ends" but in the "middle", no matter which end is applied unilaterally, it will eventually lead to "unreality and injustice"!
The premise for lawyers to defend bad guys is that the prosecutor in charge of public prosecution has stood on the opposite side of the defendant on behalf of the country! Therefore, if lawyers do not work in the opposite direction, but work in the same direction as the public security organs and procuratorates, and are oriented to severely punish crimes, the result will only be that at the factual level, along the direction of digging out all the unfavorable facts of the defendant, they will slip into the trap of ignoring or even exaggerating and fabricating unfavorable facts. On the level of "justice", we have crossed the position of justice along the direction of severely punishing crimes and slipped into the trap of excessive punishment and revenge on criminals.
For example, in a recently heated case of a rich man molesting a young girl. If there is no lawyer to defend, but everyone Qi Xin works together to demand severe punishment, the high probability result will be that the crimes and sentencing of the rich involved are untrue and illegal, and eventually deviate from the truth and justice!
In the absence of opposing forces, extremes are bound to be the only final result. Unfortunately, truth and justice are not in the top position, and they must be balanced by confrontation, which also doomed someone to make a reverse effort in the position of "bad guy", and in criminal cases, this person is a defense lawyer.
There is a working method called reverse operation, such as soldiers. Their job is fighting, but their purpose is peace. They usually need war to achieve peace. Just like lawyers, we pursue justice, but often by defending the bad guys!