The Kings are a bad franchise until proven otherwise. For that alone, prospects are going to be a bit wary of getting drafted by Sacramento.
But in Ivey's case, he and his team see the same thing we all do - he's not a natural fit alongside Fox. So I don't really take anything away from this beyond that Jaden Ivey is probably right to not have the Kings as a "preferred" destination.
But if McNair thinks he's clearly the top talent available at #4 then you draft him and figure it out.
Personally, Jaden Ivey isn't my ideal pick in this draft either, and for some of the same reasons. So trade up if there's a deal that makes sense (#4 and a lightly protected future FRP for #2?) or see if there's a trade down deal that makes sense (#4 and Holmes to CHA for Washington, #13, #15 and maybe a lotto protected FRP? Or squeeze an asset out of DET or IND to move down a spot or two?). If not, draft Ivey if the top 3 go chalk. Right now the goal is to acquire as much talent as possible.