Win, your cynical attitude about our entire system of justice is horrifying, to put it mildly. Just to answer part of what you said, no, the jury doesn't consist of 12 people who were not smart enough to get out of jury duty. It is very easy to get out of jury duty if one wants to. The one time I was on a jury, in a car theft case, I found it an inspiring experience. My fellow jurors were serious and a little bit awed to be in that jury box, not an ignorant, brutal mob such as you seem to be advocating, but people who were glad to be part of the process. We took the case very seriously. The guy was obviously guilty, and we found him guilty in an hour or less. He did not get away with his crime.
The prosecutor and the defense attorney likewise took their jobs seriously. They explained everything to us so that it would be perfectly clear, and answered any questions. After the trial ended, they called us in to a meeting and asked us what factors led us to a guilty verdict. They seemed genuinely interested in learning from the experience.
So no, we didn't form an outraged mob to tear a car thief limb from limb, as you would probably have preferred, Win. Sorry, but I prefer to live in a country that has advanced beyond the cave man days.