You say that as if I want to do it for shits and giggles.

Yes, I would love for that to be unnecessary. For people to just look at a person and be able to accurately tell if they are guilty or not. That is not the world we live in.

So in absence of that, I want something to prevent innocent people being punished (to a reasonable degree). Nothing better than a (watered down) trial was invented as far as I know.