Why should the United States hand over jurisdiction to a jury composed of ordinary people?

It is purely to provide operating space for capital, and lawyers can also shelter from the wind and rain. Through this operation, first, the so-called procedural justice is obtained. In the United States, procedural justice is greater than legal justice. Second, because jurors are ordinary people, their identification ability is limited, which gives capital and lawyers huge operating space. Whether it is direct bribery or court inducement, it always works. Such cases, especially many famous cases, have been searched a lot on the Internet. Third, because ignorance is the most important means of ruling in any society that exploits society, the jury composed of ordinary people has been brainwashed for a long time and formed a lot of distorted knowledge. At the same time, due to the gap between individuals, the jury's decision will be full of randomness. We can often see that due to the seriousness and efforts of a jury member, the case has got completely different results, but this is only a minority. Or Plato said that professional things should be done by professional people. If you are sick, would you like to see a doctor, or would you like to pull a bunch of people from the square to vote?