Let me spell it out for you too
To get a conviction you need (or should need) proof.
Therefore "Most cases will not even go to court unless there is enough evidence to convict the defendant. " is spot on right.
Ever heard of presumed innonence?
Whether a guy committed a crime or not, guilty is a judicial verdict and pretty much a matter of opinion (the opinion of the court that is).
Most people who go to court probably did the crime. You've still got to prove it to the court. That's what it's there for.
Buggered if I know what we're really arguing about..........
Cheers,
Tony