I'm trying to figure out what the point of this post was, and I'm coming up empty. I guess the answer depends on who would be the QB in Brady's place. If he was good, Belichick would probably have some titles. Definitely not 5, but some other number that's less than 5. Probably a lot less than 5. If his QBs were Brock Osweiler, or something similarly ****ty, then he'd have none. Given Belichick's track record outside Brady (ie drafting and developing Garoppolo), I'm guessing it's not blind luck that Belichick found Brady, and that in some alternate universe where Brady never played in the NFL he'd have found himself some pretty good QBs anyway. Probably good enough to win a title or two.
But just by looking into it that far I think this question has already been given more attention than it deserves .Better answer: who the **** cares?