Part of the reason that Jordan quit to play baseball, was the pressure he felt and dealing with his father’s murder. He needed a change of scenery and went to fight for a new dream. Once that he realized his baseball would never fulfill the basketball void, he returned to the NBA.
Biles owes nobody an explanation. She is a survivor of sexual assault, fought through and won multiple individual and team gold medals in the Olympics and World Games, and she knew that she wasn’t herself. If she felt this way and felt someone else should be the better option, there are few more prepared in the world to make that decision.