I agree with a lot of this post. However... Mike wasn't pissed that Biggs supposedly took his spot at the Olympics. Mike was an alternate. He was pissed at Biggs for snubbing him, being aloof by looking down on him and treating him bad as if he wasn't good enough to be there. Had nothing to do with Biggs taking his spot.
This may be a “two things can be true” situation. Per the Chicago Tribune before Tyson-Biggs for the heavyweight title, Tyson wanted to fight at super heavyweight in the Olympics, which of course Biggs won the gold medal: Tyson felt that should have been his medal, but amateur officials preferred Biggs in the super heavyweight division, which forced Tyson to the heavyweight division, where he lost a decision to Henry Tillman in the trials.” https://boxrec.com/wiki/index.php/Mike_Tyson_vs._Tyrell_Biggs