A huge chunk of judicial history is about just this issue. It’s a lot more effective to just throw all accused in jail without a trial: you’re likely to get all the accused (effective) but you’re also likely to round up as many innocent people (immoral).

Society came together and decided that the morality of locking up an innocent person was so obscene that the prosecution would have to prove beyond a reasonable doubt that someone was guilty.

It’s ok for everyone to come together and admit we have a tragedy of commons that needs collective action, but I think this incredible willingness to hand-wave individual responsibility is really concerning these days.