Funnily enough, the lawyers present in the courtroom routinely arrive at a disagreement on this point. For some mysterious reason, the lawyers hired by the accused will routinely find that no law was broken, whereas the lawyers hired by the accuser will routinely find that laws had been broken. So perhaps your suggestion of lawyers deciding on verdict has some issues?
> bench trials are successfully conducted throughout the world
True, for some value of "successful". A bench trial is much cheaper than a jury trial, and is much less likely to come up with the "wrong" verdict. Bench trials are characteristic of justice in authoritarian countries.
