It is too easy to say that a broker has access to all information, and the player in question does not. That is very unusual. A player has every right to know what he has done wrong, and is also entitled to all evidence. You do not have to make that evidence public, but send it to zikzik via email for example.
What you are suggesting is that we give lessons to a cheater on how to not get caught next time. What is your specific issue with having one or more a 3rd party mediators review the evidence and make an impartial decision based on it?