Jimmy has come closer than any other QB in the league who hasn’t won with the possible exception of Matt Ryan.
So is your definition that only a QB who has won a SB can win a SB? If so, only Tampa, GB, KC, and Pittsburgh (plus wherever Nick Foles is) can ever win one...
And Deshaun hasn’t won yet (nor has he gotten to it or to the conference champ both of which Jimmy has done), so how do we know that he can and Jimmy can’t?