It cannot be said that lawyers who defend criminals are all bad lawyers. Because this is the requirement of criminal defense system and the embodiment of criminal justice. Although criminals have violated the criminal law, they still have the right to defend their actions from the aspects of lightening or reducing their sentences, which requires defense lawyers. The defense lawyer has no intention of quibbling a guilty person into an innocent person. Their business scope is still many, mainly procedural and substantive.
For example, in the trial of Saddam Hussein, everyone knows what he is accused of and has overwhelming evidence, but without defense, he cannot be sentenced to death directly. Therefore, his defense lawyer was repeatedly assassinated and the trial could not be held.