Who says "no"?
Bulls get: to take a flyer on Zion, a top 10 player when "healthy", while giving up no real assets.
Warriors get: to rid themselves of the Kuminga fumble and replace him with real rotation players.
Pelicans get: to rid themselves of Williamson's health issues and replace him with Kuminga which would give them a super athletic 3 wing starting line-up. If they don't like him then they can just decline his team option or play him out next season for a larger sample size.
Suns get: the power forward they've been looking for to fill their need for size and rebounding at that position.