I can say for certain that some people waive a jury when the judge is known to more often than not find defendants not guilty of Distributing Controlled Substances and instead is likely to only convict on simple possession. I can say for certain that some people opt for a trial by judge when they know that said judge often finds prosecutor arguments based on co-conspirator testimony or testimony of snitches are not reliable. Like I said, there are many reasons a defendant may opt away from having a jury trial. Also, I don’t see how your disdain for lawyers is relevant to the concept of a judge vs jury trial.