That is absurd. The hardest part by far of winning a championship is drafting elite players. If Ainge hadn't made the Brooklyn trade, then drafted Smart, Tatum, Brown, and Rob, we would be on the treadmill.
Stevens deserves credit for hiring Udoka and bringing back Horford, but Ainge did all the heavy lifting beforehand. If he drafts Fultz instead of Tatum, or Bender instead of Brown, we are not having this conversation. Full Stop.
Oh, and it was Ainge who hired Stevens in the first place.