Earlier quoted context omitted.
If you're guilty you want a jury trial. If you're innocent you want a bench trial.
That is not always true, it really does depend on the crime. Jury Nullification does still exist and is becoming more popular especially for things like Drug Laws. Also some self defense cases are better for Jury, where as some may be better for a Bench Trial It depends on if your guilt or innocent hangs on an emotional reaction, or a strict application of the law.
How is that a counter-example to the guideline "if you're guilty you want a jury trial"? It sounds like you're saying if I'm guilty of drug possession I want a jury trial.