She told him that she interfered in events to “prevent countless terrible futures and there’s always another one.”
As for why Doctor Strange sent Hulk to Sakaar, it’s a prison planet paradise. But more importantly, the Avenger was Strange’s “alarm clock” for Avengers Infinity War and Endgame.
After all, everything kicks off when Bruce Banner lands in the Sanctum Sanctorum and warns the wizard and Wong of Thanos seeking the Infinity Stones.
Surely, Strange had already foreseen all this since he has the Time Stone, argues the theorist.