How so? If that's what it takes to get the desired player then that's what it takes. I get that nobody wants to give up #10, but if Vlade, Catanella and Perry are all-in on a particular player that is in no way guaranteed to be there at #5 -- that's not a bad trade to make.
Perhaps the Kings will get extremely lucky and the player they covet most will make it to #5. But the way things have been looking lately, if that player is FOX, there's a real danger of missing out on him if you don't trade up.
If they decided to make a trade up to #3 after BOS and LA's selections, how exactly could you proclaim that they've been hoodwinked? While perhaps you don't believe Philly would take Fox there, PHX could with the very next pick OR some other team could make a deal with PHI or PHX to trade up ahead of the Kings to steal the same player.
I would like to believe that they could trade up to #3 w/o having to part with #10 -- perhaps by trading an existing piece or even less likely with #34. However, that might not be a possibility and #10 might need to be leveraged.
I agree with @
SacTownKid that this is the year to draft quality over quantity. If there's a player you believe to be a perfect fit with what you are currently building, you do everything you can within reason to get that player. The Kings already have a lot of young players to develop. Losing out on #10 wouldn't be the worst thing in the world if it landed the player they covet most.