I get that and agree, but I'm trying to look at it from Essential and Colangelo's perspectives, on some If I DId It...This Is How by OJ tip.
It's like fantasy football. You've got a no-name putting good solid numbers and a known flaky, wannabe scrub. Would you trade them for a player that used to be a stud a year or 2 ago if you were damn near out of the playoff picture? Even if you got fleeced, you could still feel like you took a shot at something and like leeme said, he's got a name and a soon to be expiring contract. That's worth something and there are narratives you can see the fans there. Filling seats =/= being able to say you did something to your fans and sell them on getting an NBA Champion and blah blah blah.
That is, if you were Bryan Colangelo, someone stupid enough to Landry Fields themselves.