That is a bit unfair. Brady owes his career to Belichick as much as Belichick owes his to Brady. That would be like putting an asterisk next to every coach that had a great / HoF QB (Dungy, Walsh, Reid, Tomlin, Johnson etc.) or only considering coaches great when they won without a great / HoF QB.
Simple truth, Brady would not have been Brady if he was not drafted by the Patriots and was not able to play in Belichick's system and Belichick likely wouldn't have half a dozed rings if he hadn't drafted Brady and/or if he didn't run the team the way he did.