First of all, the parties themselves may not know all the facts of the case. In most cases, the parties are the first-hand witnesses of the case, but experience tells us that the parties may not know all the facts and processes of the case.
Second, the limitations of the parties make it difficult for them to correctly and accurately grasp the facts and the nature of the facts and the legal significance of the facts.
Third, most of the parties in criminal cases are deprived or restricted of their personal freedom and unable to collect evidence. We all know the importance of evidence in litigation, but it is difficult for these parties to collect evidence because they have lost their personal freedom.
Fourth, the psychological state of the parties affects their self-defense. When the client is in a matter of great importance, the lawsuit is directly related to himself, and he often has the ambivalence of being afraid of the wolf before and the tiger after, so it is difficult to fully exercise his right to defense. Due to the above reasons, the client cannot fully and effectively defend himself in the process of criminal proceedings. Lawyer's defense can overcome these limitations, so that the client can truly enjoy the right of defense given by law and be treated fairly.
Even in countries with written laws, due to the lag and imperfection of legal provisions, it is often unable to accurately meet the requirements of practice. Therefore, in order to bridge this gap, legal practice has derived a set of matching rules, but the parties often can't understand these rules accurately, which eventually leads to a certain degree of failure. Moreover, the parties are limited by their own experience and often can't find legal demands that meet their own needs.
Therefore, my suggestion is that for some controversial litigation cases, lawyers can be hired, or in order to save costs, lawyers can be hired for a fee, so as to ensure that lawyers can participate in the whole process of the case even if they do not attend the court session, and their legitimate rights and interests will not be harmed. Of course, two lawyers can also be invited to appear in court at the same time.