I don't believe anyone wants to create a new legal system, but the reality is the vast majority of sexual assault cases aren't resolved in court due to existing social issues. These "judges, jurries and prosecutors" are just people who don't want to associate with potentially dangerous people regardless of the legal outcome. Beyond legal consequences to crime there have always been social consequences too - I think the major difference compared to the past is that these companies put out press releases instead of just blacklisting someone and moving on.