These things can be (and are) explained. Trials that contain complex technical violations tend to take longer, sure. Judges, expert witnesses, lawyers all spend a huge amount of time learning about/explaining these issues. It's especially incumbent upon the prosecutor to explain complicated issues -- if the jury can't understand someone's guilt, they are less likely to consider someone guilty beyond a reasonable doubt. Which is very, very good: it sets the bar higher for conviction, and it encourages the state to, if it wants to convict, make simpler clearer laws. Complex morasses of incomprehensible laws are not necessary and only serve the interests of those who can pay to create or avoid them.

Also, none of these subjects are so difficult and complicated ordinary people cannot understand them. I've never heard of a trial requiring any real deep knowledge, like requiring jurors to have a serious understanding algebraic geometry or quantum mechanics or phenomenology. Hacking can be explained to ordinary people. People are not dumb. People do their own taxes and understand taxes. Trained professionals are not elite superheroes who are the only ones who can understand the world well enough to understand the difference between right and wrong. Untrained people can't do a professional's job, but they can definitely (with some help and background) tell when a professional has committed a crime. This case is easily understandable. I'm not a securities expert but I can make a fine assessment here just from reading an article, even without hours and hours of doing nothing but learning about the specific case and law (which is what jurors get); we all know what fraud is.