Why the Hawks do this trade: Atlanta moves Kobe Bufkin and a protected first for a proven backup guard who can operate as a ball handler and defensive option for Atlanta. Dosunmu can play alongside Trae Young or Dyson Daniels and be a strong point of attack defender. Dosunmu can fill the need that the Hawks were hoping Bufkin would do when they drafted him. He is a career 36.1% shooter from three as well. He would strengthen the Hawks' bench immediately. The ability to have Daniels, Alexander-Walker, and Dosunmu as primary defensive options gives the Hawks lots of versatility on that end of the floor.
Why the Hawks don't do this trade: Dosunmu has battled injuries as well and is one the last year of his contract, meaning the Hawks would likely have to pay him a good-sized contract. Atlanta had hoped Bufkin could play the role that Dosunmu does, and may just bet that he can stay healthy instead of trading him and a first to Chicago. While he has had good years shooting the ball, he was only 32.1% from three last season.
Why the Bulls do this trade: They move White and get a good player who does not fit with the Spurs current timeline. It would be an upgrade in talent and it does not come at a prohibitive cost, which seems like the kind of trade that the Bulls would make. Taking a flier on Bufkin is not a bad idea, as he has two-way upside if he can stay healthy.
Why the Bulls don't do this trade: Does Fox fit with Giddey? Maybe this trade is a signal that the Bulls won't bring back Giddey, but if they do, I don't know how those two players fit together. How does the team plan to put talent around Fox? He is a talent upgrade, but this roster is still far away from being a contender in the Eastern Conference.
Why the Spurs do this trade: They move Fox to build a team that makes more sense around Victor Wembanyama and Dylan Harper. Harper can move into the starting role, and White could be the lead guard off the bench. White is coming off a season in which he averaged a career-high 20.4 PPG on 45/37/90 shooting splits. He could operate off and on the ball and give the Spurs a scoring threat at guard that they have lacked. The Spurs need shooting, and both White and Huerter provide that, and getting another first-round pick is not a bad deal either.
Why the Spurs don't do this trade: Do they want to give White a contract extension and what does that look like? Are they really willing to move Fox already after making the big trade for him? Huerter did not have a good season for the Kings/Bulls and has not been able to look like the player he was in Atlanta. A better package might be out there for Fox.