What is there to explain? Sam Altman played a stupid game, founding a sham nonprofit instead of a startup, and won a stupid prize when the board fired him for dishonesty.
Why Altman was fired.
What dishonesty? I'm sympathetic to this version of events, but if it's true then the board ought to be able to give specifics - and if they can't then the strident tone of the initial announcement was unjustified.