I agree Brown was a reach, but there is little incentives for teams to trade down with us. Suns doesnt want Dunn, if Boston wanted to trade with the wolves it means they dont want to take Dunn so he still falls to them even if they dont trade down. The pelicans have been linked to Hield and there is little indication that the Celtics, Suns and Wolves wanted to draft him so they are safe. The Nuggets are in no need of a PG.
The only team that really needed to trade with us was the Sixers, and the Wolves, but the Wolves.. it is predicated on the possibility that the Celtics want Dunn at 3. All other teams may want Dunn, but at that point there's a chance Brown might not be available anymore. So I guess that's why they picked Brown at 3 and didnt trade down for it.