Juries are a way of preventing the "system" having all of the power. A jury of my peers is a different demographic to a well educated but entirely indoctrinated 50 year old judge. They don't see this every day, they won't have built up the same responses that a judge inevitably would.
The proverbial headmaster arbitrarily deciding my fate? That feels more terrifying than a jury of my peers, to me.
The proverbial headmaster arbitrarily deciding my fate? That feels more terrifying than a jury of my peers, to me.