#2 Matches are predetermined
Unlike other combat sports, in professional wrestling, the outcomes of every match are already planned before the match takes place. Vince McMahon and his creative team already know who is going to win, how they are going to win, who is going to lose the match and how they are going to lose. They know how the match will end before the match begins. This is because matches are predetermined. All the wrestlers competing in the match and all the referees also know how the match will end.
Wrestlers work together in the ring and the referee will inform them in case there are any changes to the match so that everyone can know what to expect. Things can still go wrong however and outcomes can be changed last minute or during the match. Even championship matches are predetermined, so when superstars begin the match they know that they will drop their titles to their opponents.