Well the point of the trial is to make a binary decision, so it has to be guilty or not guilty to a certain standard of evidence.
Think of it as "should you bring an umbrella to go outside today?" – the weather forecast has a probability, but your job is to turn that probability into a decision based on your risk tolerance. You can't bring a 30% umbrella for a 30% chance of rain.
Think of it as "should you bring an umbrella to go outside today?" – the weather forecast has a probability, but your job is to turn that probability into a decision based on your risk tolerance. You can't bring a 30% umbrella for a 30% chance of rain.