Smart was the PG on the best 5-player lineup in the NBA this season, the #1 defense, two wins away from the Finals. While other PG’s get targeted on defense, Marcus is avoided. He captains the defense and switches 1-4 at an elite level.
“Replace Player X with Player Y, look at all of Player Y’s perceived strengths and all of X’s weaknesses!”. It seems people don’t get it until they see a player in a Celtics uniform being targeted, abused, and the demands of the defense affect their offensive efficiency.
White was acquired because he’s similar to Smart with his own strengths that make him a good fit alongside the core. He’s part of what made us the most versatile team in the NBA, going small without being small. We easily matched 3 guard lineups and deterred opponents from playing theirs when they needed offense because of him.
And for reference, not every pairing is built to share the floor, Curry and Poole will continue to thrive while playing most of their minutes apart because they (the coaching staff and personnel) make it work.