I have been on jury duty and many of the jurors just sit there and do not follow the case, especially if it is somewhat technical.
Not only a jury of peers but there should be a minimum level of competency required. They should at least be able to read and write understand the English language and be able to follow instructions.
I was called for jury duty.
Most of the people seemed reasonable.
It was for a tobacco case. I was amazed by the number of potential jurors who were able to kick the habit.
I was on a jury panel and got removed by the prosecutor via one of her allowed challenges. On the way out I rode down in the elevator with another guy she tossed. He asked "why did they throw you out?" We had all gone up to be interviewed by the judge individually and nobody could hear what she or we said. I said "I dunno, maybe that I live next to a cop" He shook his head. "Nah, what do you do for a living?" I said "Engineer". He responded "that's it. I'm a lawyer, I knew there was no chance I would have to serve. They don't want anyone who they think has a brain."
I am sure you have a brain so somehow they screwed up and let you slip by.