Look, if the Mavs thought Morez was the best player available that's one thing.From their POV, they wouldn’t have gotten Morez had they traded back. At least would’ve been super risky.
Let’s say you trade with OKC and they take Mara at 9 …. MIL at 10 takes Burries.
How do you know GSW won’t take Morez? Coming into today, Morez’s draft stock was thought to be higher than Yaxel (who’s pre draft interviews / workouts / intel was questionable for a lot of teams).
IMO, your argument would work better with GSW for taking Yaxel (who goes ahead of Mara, Steinbach, Ament). If they had traded down to 14 or 15, it’s very possible (likely) they still would’ve ended up with him.
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FWIW, Dusty had always thought of Morez as the anchor/leader of last year’s Michigan team. Yaxel when he got there had some lethargic personality moments, often cited as he didn’t know “how to work.” But Morez was the barometer of the locker room. His effort was never in question.
But if they didn't and just drafted him because he "fit" better, which is what you suggested, then that's dumb. There are other ways to get a player that fits your system and personnel. The NBA draft, and this is particularly true the higher in the draft you're talking about, is purely about extracting maximum value. A better player, or a player that is more valued by the rest of the league, even if he doesn't "fit" as well, can be used as a valuable trade chip.