It's ridiculous to let a bunch of plebs decide if someone is guilty or not. A completely different set of people could come to a different conclusion, so how is that a fair and just system? The fact people are forced to do it further influences the outcome as I bet some people just want to get back to work and would side with the others if it meant getting out of it quicker.
While I don't necessarily disagree that in today's day and age not all crimes should be tried against a jury as it stands, I think you do a disservice to juries.
But, for example, my friend got caught up in a fraud case. He was selling financial vehicles in good faith, but the underlying scheme turned out to be a massive fraud.
He told me about it as he had to go to crown court to testify etc and, even I with a degree in accountancy, having qualified as a financial advisor and having spent 20+ years working in and around finance functions found it hard to follow. How the layman is expected to follow such cases is beyond me.
This is the thing with both juries and everybody being able to vote, it made sense in a simpler world, bu the world is so complicated and the level of education/knowledge/intelligence required to fully understand it all is beyond a lot of people, myself included.
However I also served on a jury for a murder case which took 4 weeks. I can assure you that after sitting through 4 weeks of testimony we were drained and wanted to get home when we were asked for a verdict.
Not one person took the decision lightly though, we'd heard too much and the stakes were too high.