In theory I think he will be healthy enough to play by November. But with Goff on the roster, I don’t think even Stroud or Young would have played this year, outside of a backup role.
Without pulling up statistics, it sure feels like QBs who have had a year to redshirt and learn an offense before getting hit by NFL defensive linemen have a better track record. Mahomes, Rodgers, Brady, and Hurts all come to mind as guys who were allowed to have a slow start to the league.